TY  - JOUR
AU  - Milovanović, Milan R.
AU  - Boucher, Mélanie
AU  - Cornaton, Yann
AU  - Zarić, Snežana D.
AU  - Pfeffer, Michel
AU  - Djukic, Jean-Pierre
PY  - 2021
UR  - https://onlinelibrary.wiley.com/doi/abs/10.1002/ejic.202100750
UR  - C:\Users\Ana\Zotero\storage\ZAYTN3C5\Milovanović et al. - 2021 - The Thermochemistry of Alkyne Insertion into a Pal.pdf
UR  - C:\Users\Ana\Zotero\storage\JYEI976E\ejic.html
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4783
AB  - In an effort to determine the thermochemistry of established organometallic transformation, the well documented reaction of alkynes with a palladacycle was investigated by isothermal titration calorimetry (ITC). Although the mechanism of the insertion of unsaturated substrates into the Pd−C bond of cyclopalladated compounds is known, no information is available so far about their thermochemistry. The enthalpies of the reactions of Ph−C≡C−Ph and MeOC(O)−C≡C(O)COMe with the bisacetonitrilo salt of the N,N-benzylamine palladacycle were determined by ITC in chlorobenzene after having optimized the conditions to ensure that only the double and a single insertion of alkynes were occurring respectively. The reaction energy profile established by DFT for the double insertion process involving Ph−C≡C−Ph confirmed earlier conclusions on the rate determining character of the first insertion. Further computations of reaction enthalpies reveal significant discrepancies between ITC and DFT-D/continuum solvation enthalpies, that are suspected to arise from an unexpected explicit noncovalent interaction of PhCl with the components of the reaction.
PB  - Wiley
T2  - European Journal of Inorganic Chemistry
T1  - The Thermochemistry of Alkyne Insertion into a Palladacycle Outlines the Solvation Conundrum in DFT
VL  - 2021
IS  - 45
SP  - 4690
EP  - 4699
DO  - 10.1002/ejic.202100750
ER  - 

@article{
author = "Milovanović, Milan R. and Boucher, Mélanie and Cornaton, Yann and Zarić, Snežana D. and Pfeffer, Michel and Djukic, Jean-Pierre",
year = "2021",
abstract = "In an effort to determine the thermochemistry of established organometallic transformation, the well documented reaction of alkynes with a palladacycle was investigated by isothermal titration calorimetry (ITC). Although the mechanism of the insertion of unsaturated substrates into the Pd−C bond of cyclopalladated compounds is known, no information is available so far about their thermochemistry. The enthalpies of the reactions of Ph−C≡C−Ph and MeOC(O)−C≡C(O)COMe with the bisacetonitrilo salt of the N,N-benzylamine palladacycle were determined by ITC in chlorobenzene after having optimized the conditions to ensure that only the double and a single insertion of alkynes were occurring respectively. The reaction energy profile established by DFT for the double insertion process involving Ph−C≡C−Ph confirmed earlier conclusions on the rate determining character of the first insertion. Further computations of reaction enthalpies reveal significant discrepancies between ITC and DFT-D/continuum solvation enthalpies, that are suspected to arise from an unexpected explicit noncovalent interaction of PhCl with the components of the reaction.",
publisher = "Wiley",
journal = "European Journal of Inorganic Chemistry",
title = "The Thermochemistry of Alkyne Insertion into a Palladacycle Outlines the Solvation Conundrum in DFT",
volume = "2021",
number = "45",
pages = "4690-4699",
doi = "10.1002/ejic.202100750"
}

Milovanović, M. R., Boucher, M., Cornaton, Y., Zarić, S. D., Pfeffer, M.,& Djukic, J.. (2021). The Thermochemistry of Alkyne Insertion into a Palladacycle Outlines the Solvation Conundrum in DFT. in European Journal of Inorganic Chemistry
Wiley., 2021(45), 4690-4699.
https://doi.org/10.1002/ejic.202100750

Milovanović MR, Boucher M, Cornaton Y, Zarić SD, Pfeffer M, Djukic J. The Thermochemistry of Alkyne Insertion into a Palladacycle Outlines the Solvation Conundrum in DFT. in European Journal of Inorganic Chemistry. 2021;2021(45):4690-4699.
doi:10.1002/ejic.202100750 .

Milovanović, Milan R., Boucher, Mélanie, Cornaton, Yann, Zarić, Snežana D., Pfeffer, Michel, Djukic, Jean-Pierre, "The Thermochemistry of Alkyne Insertion into a Palladacycle Outlines the Solvation Conundrum in DFT" in European Journal of Inorganic Chemistry, 2021, no. 45 (2021):4690-4699,
https://doi.org/10.1002/ejic.202100750 . .

TY  - JOUR
AU  - Petrović, Predrag
AU  - Grimme, Stefan
AU  - Zarić, Snežana D.
AU  - Pfeffer, Michel
AU  - Đukić, Jean-Pierre
PY  - 2014
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1806
AB  - Self-aggregation in water of anti-cancer agents such as oxaliplatin (1) or its palladium-containing parent (2) is suspected to be the main reason for the exceptional resistance of concentrated infusions of these complexes to hydrolysis; this hypothesis, i.e. the self-association of metal chelates, was investigated in a systematic manner by experimental and theoretical means. H-1 diffusion-ordered NMR spectroscopy (DOSY NMR) and UV-visible absorption titration were inconclusive as to the formation of a dimer of 1 in water or DMSO. Further isothermal titration calorimetry (ITC) methods allowed the accurate determination of the enthalpy of formation of only the homodimer [2](2) and putative heterodimer [1.2] together with an estimation of the formation constants, which indicate that dimer formation is not a spontaneous process in solution, whereas electrospray ESI mass spectroscopy tends to suggest the contrary in the gas phase. A dispersion-corrected DFT method, i. e. DFT-D (BLYP-D3), was used to model the aggregation in solution (COSMO) and to investigate the assisting role of London force in the cohesion of bimolecular aggregates. The concordance of experimental and theoretical thermodynamic parameters was judged reasonably even though the treatment of solvation by conventional continuum models does not account for specific interactions of the solute with molecules of solvent; nonetheless these results outline the importance of dispersion, a.k.a. London force. The role of the latter was further stressed by computing the affinities of 1 and 2 for the lipophilic cavity of cucurbit[7]uril in modeled water (COSMO-RS), which were preliminarily determined experimentally by ITC methods using pure water as solvent. From our investigations carried out in pure water the connection between the notorious chemical stability of "concentrated'' infusions of 1 in aqueous media and the formation of oligomers remains unsettled.
PB  - Royal Soc Chemistry, Cambridge
T2  - Physical Chemistry Chemical Physics
T1  - Experimental and theoretical investigations of the self-association of oxaliplatin
VL  - 16
IS  - 28
SP  - 14688
EP  - 14698
DO  - 10.1039/c4cp01500b
ER  - 

@article{
author = "Petrović, Predrag and Grimme, Stefan and Zarić, Snežana D. and Pfeffer, Michel and Đukić, Jean-Pierre",
year = "2014",
abstract = "Self-aggregation in water of anti-cancer agents such as oxaliplatin (1) or its palladium-containing parent (2) is suspected to be the main reason for the exceptional resistance of concentrated infusions of these complexes to hydrolysis; this hypothesis, i.e. the self-association of metal chelates, was investigated in a systematic manner by experimental and theoretical means. H-1 diffusion-ordered NMR spectroscopy (DOSY NMR) and UV-visible absorption titration were inconclusive as to the formation of a dimer of 1 in water or DMSO. Further isothermal titration calorimetry (ITC) methods allowed the accurate determination of the enthalpy of formation of only the homodimer [2](2) and putative heterodimer [1.2] together with an estimation of the formation constants, which indicate that dimer formation is not a spontaneous process in solution, whereas electrospray ESI mass spectroscopy tends to suggest the contrary in the gas phase. A dispersion-corrected DFT method, i. e. DFT-D (BLYP-D3), was used to model the aggregation in solution (COSMO) and to investigate the assisting role of London force in the cohesion of bimolecular aggregates. The concordance of experimental and theoretical thermodynamic parameters was judged reasonably even though the treatment of solvation by conventional continuum models does not account for specific interactions of the solute with molecules of solvent; nonetheless these results outline the importance of dispersion, a.k.a. London force. The role of the latter was further stressed by computing the affinities of 1 and 2 for the lipophilic cavity of cucurbit[7]uril in modeled water (COSMO-RS), which were preliminarily determined experimentally by ITC methods using pure water as solvent. From our investigations carried out in pure water the connection between the notorious chemical stability of "concentrated'' infusions of 1 in aqueous media and the formation of oligomers remains unsettled.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Physical Chemistry Chemical Physics",
title = "Experimental and theoretical investigations of the self-association of oxaliplatin",
volume = "16",
number = "28",
pages = "14688-14698",
doi = "10.1039/c4cp01500b"
}

Petrović, P., Grimme, S., Zarić, S. D., Pfeffer, M.,& Đukić, J.. (2014). Experimental and theoretical investigations of the self-association of oxaliplatin. in Physical Chemistry Chemical Physics
Royal Soc Chemistry, Cambridge., 16(28), 14688-14698.
https://doi.org/10.1039/c4cp01500b

Petrović P, Grimme S, Zarić SD, Pfeffer M, Đukić J. Experimental and theoretical investigations of the self-association of oxaliplatin. in Physical Chemistry Chemical Physics. 2014;16(28):14688-14698.
doi:10.1039/c4cp01500b .

Petrović, Predrag, Grimme, Stefan, Zarić, Snežana D., Pfeffer, Michel, Đukić, Jean-Pierre, "Experimental and theoretical investigations of the self-association of oxaliplatin" in Physical Chemistry Chemical Physics, 16, no. 28 (2014):14688-14698,
https://doi.org/10.1039/c4cp01500b . .

TY  - JOUR
AU  - Iali, Wissam
AU  - Petrovic, Predrag V.
AU  - Pfeffer, Michel
AU  - Grimme, Stefan
AU  - Djukic, Jean-Pierre
PY  - 2012
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5372
AB  - A series of iridacycles bearing π-bonded moieties of variable electron-withdrawing capabilities were tested for their ability to promote water oxidation catalysis (WOC) in the presence of high loading in a sacrificial oxidant, under conditions chosen for optimal dioxygen production. This report shows that none of these complexes performs differently than monometallic iridacycles and that the π-bonded moiety does not affect the overall rate of O2 production. Furthermore, it is shown that cucurbituril macrocycles significantly inhibit the production of dioxygen independently of the nature of the Cp*Ir(III)-based catalyst used to perform WOC. Theoretical first-principles based DFT-D3 investigations including a complete treatment of solvation with COSMO and COSMO-RS treatments supported by ITC analyses suggest that concealment of the catalyst by curcurbit[7]uril could occur by non-covalent interaction of the Cp*Ir moiety in the hydrophobic pocket of the cavitand. For other cavitands of smaller inner cavity diameter, inclusion may not be the main mode of inhibition. Assuming the intervention of the putative Ir(IV)–oxyl biradical of a Cp*IrIV(O)(H2O)2 species like suggested by many authors, inhibition of WOC by inclusion would probably result from unfavourable coulombic interactions between water and the inclusion complex.
PB  - Royal Society of Chemistry
T2  - Dalton Transactions
T1  - The inhibition of iridium-promoted water oxidation catalysis (WOC) by cucurbit[n]urils
VL  - 41
SP  - 12233
DO  - 10.1039/C2DT31363D
ER  - 

@article{
author = "Iali, Wissam and Petrovic, Predrag V. and Pfeffer, Michel and Grimme, Stefan and Djukic, Jean-Pierre",
year = "2012",
abstract = "A series of iridacycles bearing π-bonded moieties of variable electron-withdrawing capabilities were tested for their ability to promote water oxidation catalysis (WOC) in the presence of high loading in a sacrificial oxidant, under conditions chosen for optimal dioxygen production. This report shows that none of these complexes performs differently than monometallic iridacycles and that the π-bonded moiety does not affect the overall rate of O2 production. Furthermore, it is shown that cucurbituril macrocycles significantly inhibit the production of dioxygen independently of the nature of the Cp*Ir(III)-based catalyst used to perform WOC. Theoretical first-principles based DFT-D3 investigations including a complete treatment of solvation with COSMO and COSMO-RS treatments supported by ITC analyses suggest that concealment of the catalyst by curcurbit[7]uril could occur by non-covalent interaction of the Cp*Ir moiety in the hydrophobic pocket of the cavitand. For other cavitands of smaller inner cavity diameter, inclusion may not be the main mode of inhibition. Assuming the intervention of the putative Ir(IV)–oxyl biradical of a Cp*IrIV(O)(H2O)2 species like suggested by many authors, inhibition of WOC by inclusion would probably result from unfavourable coulombic interactions between water and the inclusion complex.",
publisher = "Royal Society of Chemistry",
journal = "Dalton Transactions",
title = "The inhibition of iridium-promoted water oxidation catalysis (WOC) by cucurbit[n]urils",
volume = "41",
pages = "12233",
doi = "10.1039/C2DT31363D"
}

Iali, W., Petrovic, P. V., Pfeffer, M., Grimme, S.,& Djukic, J.. (2012). The inhibition of iridium-promoted water oxidation catalysis (WOC) by cucurbit[n]urils. in Dalton Transactions
Royal Society of Chemistry., 41, 12233.
https://doi.org/10.1039/C2DT31363D

Iali W, Petrovic PV, Pfeffer M, Grimme S, Djukic J. The inhibition of iridium-promoted water oxidation catalysis (WOC) by cucurbit[n]urils. in Dalton Transactions. 2012;41:12233.
doi:10.1039/C2DT31363D .

Iali, Wissam, Petrovic, Predrag V., Pfeffer, Michel, Grimme, Stefan, Djukic, Jean-Pierre, "The inhibition of iridium-promoted water oxidation catalysis (WOC) by cucurbit[n]urils" in Dalton Transactions, 41 (2012):12233,
https://doi.org/10.1039/C2DT31363D . .

TY  - JOUR
AU  - Đukić, Jean-Pierre
AU  - Boulho, Cedric
AU  - Sredojević, Dušan N.
AU  - Scheeren, Carla
AU  - Zarić, Snežana D.
AU  - Ricard, Louis
AU  - Pfeffer, Michel
PY  - 2009
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1027
AB  - The stereospecificity of ligand exchange at the Ir-III centre of a cycloiridium arenetricarbonylchromium complex has been established experimentally by various analytical methods as well as by X-ray diffraction structural analysis and computational investigations. Two new cases of phenyl and methyl iridium(III) complexes have been prepared by reaction of (S-p*,R-Ir*)- chlorido(2-[(tricarbonyl)(eta(6)-phenylene-kappa C-1)chromium(0)]pyridine-kappa N) (pentamethylcyclopentadienyl)iridium(III) with PhMgBr and MeMgBr. The determining influence of electrostatic repulsion has been established by means of density functional theory at the Becke-Perdew/TZP(ZORA) level by using, among other means, energy partitioning analysis. It is also shown that the Cr(CO)(3) fragment is likely to ease the ionic cleavage of the Ir-Cl bond in chlorido cycloiridium tricarbonylchromium complexes in a way similar to that already established for the solvolysis of benzyl halide complexes, that is, through a direct interaction of the CP centre with the cationic Ir-III centre.
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Chemistry. A European Journal
T1  - The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes
VL  - 15
IS  - 41
SP  - 10830
EP  - 10842
DO  - 10.1002/chem.200901344
ER  - 

@article{
author = "Đukić, Jean-Pierre and Boulho, Cedric and Sredojević, Dušan N. and Scheeren, Carla and Zarić, Snežana D. and Ricard, Louis and Pfeffer, Michel",
year = "2009",
abstract = "The stereospecificity of ligand exchange at the Ir-III centre of a cycloiridium arenetricarbonylchromium complex has been established experimentally by various analytical methods as well as by X-ray diffraction structural analysis and computational investigations. Two new cases of phenyl and methyl iridium(III) complexes have been prepared by reaction of (S-p*,R-Ir*)- chlorido(2-[(tricarbonyl)(eta(6)-phenylene-kappa C-1)chromium(0)]pyridine-kappa N) (pentamethylcyclopentadienyl)iridium(III) with PhMgBr and MeMgBr. The determining influence of electrostatic repulsion has been established by means of density functional theory at the Becke-Perdew/TZP(ZORA) level by using, among other means, energy partitioning analysis. It is also shown that the Cr(CO)(3) fragment is likely to ease the ionic cleavage of the Ir-Cl bond in chlorido cycloiridium tricarbonylchromium complexes in a way similar to that already established for the solvolysis of benzyl halide complexes, that is, through a direct interaction of the CP centre with the cationic Ir-III centre.",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Chemistry. A European Journal",
title = "The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes",
volume = "15",
number = "41",
pages = "10830-10842",
doi = "10.1002/chem.200901344"
}

Đukić, J., Boulho, C., Sredojević, D. N., Scheeren, C., Zarić, S. D., Ricard, L.,& Pfeffer, M.. (2009). The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes. in Chemistry. A European Journal
Wiley-V C H Verlag Gmbh, Weinheim., 15(41), 10830-10842.
https://doi.org/10.1002/chem.200901344

Đukić J, Boulho C, Sredojević DN, Scheeren C, Zarić SD, Ricard L, Pfeffer M. The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes. in Chemistry. A European Journal. 2009;15(41):10830-10842.
doi:10.1002/chem.200901344 .

Đukić, Jean-Pierre, Boulho, Cedric, Sredojević, Dušan N., Scheeren, Carla, Zarić, Snežana D., Ricard, Louis, Pfeffer, Michel, "The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes" in Chemistry. A European Journal, 15, no. 41 (2009):10830-10842,
https://doi.org/10.1002/chem.200901344 . .

TY  - JOUR
AU  - Scheeren, Carla
AU  - Maasarani, Fida
AU  - Hijazi, Akram
AU  - Đukić, Jean-Pierre
AU  - Pfeffer, Michel
AU  - Zarić, Snežana D.
AU  - Le Goff, Xavier-Frederic
AU  - Ricard, Louis
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/843
AB  - The reactivity of a set of prototypical (eta(6)-arene)tricarbonylchromium complexes bearing amino, oxazolyl, and pyridyl ancillary ligands versus [Cp*RhCl2](2) and [Cp*IrCl2](2) has been investigated. Successful cyclometalation reactions were achieved essentially in the presence of hydrated sodium acetate with planar-prochiral 2-phenylpyridine and 3-methyl-2-phenylpyridine complexes with yields ranging from 60% to 92%. The most salient feature of the reported reactions is their stereoselectivity, as the only diastereomers to be produced are those with the Rh- and Ir-bound chloro ligand located trans with respect to the Cr(CO)(3). According to X-ray diffraction analyses, a relative rac-(pR,T-4-S) configuration may be assigned to the complexes: the Cp* ligand sits unexpectedly syn with respect to the tricarbonylmetal moiety. Introduction of the Cr(CO)(3) moiety by treatment of cycloiridated 2-phenylpyridine with tricarbonyl(eta(6)-naphthalene)chromium resulted in a unique diastereomer of the same relative configuration. Quantum calculations using the density functional theory were carried out on models of syn and trans-chloro isomers. Owing to strong electrostatic repulsion between the chloro ligand and the Cr(CO)(3) moiety, the syn-chloro isomers were found less stable by 7-8 kcal/mol than the trans counterparts, suggesting that cyclorhodation and cycloiridation reactions are thermodynamically controlled.
PB  - Amer Chemical Soc, Washington
T2  - Organometallics
T1  - Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2)
VL  - 26
IS  - 14
SP  - 3336
EP  - 3345
DO  - 10.1021/om070170l
ER  - 

@article{
author = "Scheeren, Carla and Maasarani, Fida and Hijazi, Akram and Đukić, Jean-Pierre and Pfeffer, Michel and Zarić, Snežana D. and Le Goff, Xavier-Frederic and Ricard, Louis",
year = "2007",
abstract = "The reactivity of a set of prototypical (eta(6)-arene)tricarbonylchromium complexes bearing amino, oxazolyl, and pyridyl ancillary ligands versus [Cp*RhCl2](2) and [Cp*IrCl2](2) has been investigated. Successful cyclometalation reactions were achieved essentially in the presence of hydrated sodium acetate with planar-prochiral 2-phenylpyridine and 3-methyl-2-phenylpyridine complexes with yields ranging from 60% to 92%. The most salient feature of the reported reactions is their stereoselectivity, as the only diastereomers to be produced are those with the Rh- and Ir-bound chloro ligand located trans with respect to the Cr(CO)(3). According to X-ray diffraction analyses, a relative rac-(pR,T-4-S) configuration may be assigned to the complexes: the Cp* ligand sits unexpectedly syn with respect to the tricarbonylmetal moiety. Introduction of the Cr(CO)(3) moiety by treatment of cycloiridated 2-phenylpyridine with tricarbonyl(eta(6)-naphthalene)chromium resulted in a unique diastereomer of the same relative configuration. Quantum calculations using the density functional theory were carried out on models of syn and trans-chloro isomers. Owing to strong electrostatic repulsion between the chloro ligand and the Cr(CO)(3) moiety, the syn-chloro isomers were found less stable by 7-8 kcal/mol than the trans counterparts, suggesting that cyclorhodation and cycloiridation reactions are thermodynamically controlled.",
publisher = "Amer Chemical Soc, Washington",
journal = "Organometallics",
title = "Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2)",
volume = "26",
number = "14",
pages = "3336-3345",
doi = "10.1021/om070170l"
}

Scheeren, C., Maasarani, F., Hijazi, A., Đukić, J., Pfeffer, M., Zarić, S. D., Le Goff, X.,& Ricard, L.. (2007). Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2). in Organometallics
Amer Chemical Soc, Washington., 26(14), 3336-3345.
https://doi.org/10.1021/om070170l

Scheeren C, Maasarani F, Hijazi A, Đukić J, Pfeffer M, Zarić SD, Le Goff X, Ricard L. Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2). in Organometallics. 2007;26(14):3336-3345.
doi:10.1021/om070170l .

Scheeren, Carla, Maasarani, Fida, Hijazi, Akram, Đukić, Jean-Pierre, Pfeffer, Michel, Zarić, Snežana D., Le Goff, Xavier-Frederic, Ricard, Louis, "Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2)" in Organometallics, 26, no. 14 (2007):3336-3345,
https://doi.org/10.1021/om070170l . .