Formation of metallacarboxylic acids through Hieber base reaction. A density functional theory study

被引:1
|
作者
Ahmad, Shahbaz [1 ]
Berry, Elisabeth A. [1 ]
Boyle, Conor H. [1 ]
Hudson, Christopher G. [1 ]
Ireland, Oliver W. [1 ]
Thompson, Emily A. [1 ]
Buhl, Michael [1 ]
机构
[1] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland
关键词
Homogeneous catalysis; Water gas shift reaction; Hieber base reaction; Density functional theory; GAS-SHIFT REACTION; HYDROGEN-PRODUCTION; HOMOGENEOUS CATALYSIS; RUTHENIUM CARBONYL; AB-INITIO; MECHANISMS; COMPLEXES; ENERGY; IRON; APPROXIMATION;
D O I
10.1007/s00894-018-3915-1
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Using density functional theory (B97-D/ECP2/PCM//RI-BP86/ECP1 level), we have studied the effects of ligand variation on OH- uptake by transition-metal carbonyls (Hieber base reaction), i.e., LnM(CO)+OH-[LnM(CO2H)](-), M=Fe, Ru, Os, L=CO, PMe3, PF3, py, bipy, Cl, H. The viability of this step depends notably on the nature of the co-ligands, and a large span of driving forces is predicted, ranging from G=-144kJ/mol to +122kJ/mol. Based on evaluation of atomic charges from natural population analysis, it is the ability of the co-ligands to delocalize the additional negative charge (through their -acidity) that is the key factor affecting the driving force for OH- uptake. Implications for the design of new catalysts for water gas shift reaction are discussed.
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页数:8
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