The results of solution calorimetric studies are used to measure the relative stability in solution of the following complexes: (arene)Mo(CO)3 (arene = o-xylene, m-xylene, p-xylene, N,N-dimethylaniline, p-bis(dimethylamino)benzene, (trimethylsilyl)benzene, sodium tetraphenylborate, and sodium cyclopentadiene), L3Mo(CO)3 (L = acetone, acetonitrile, benzonitrile, tert-butyl cyanide, tert-butyl isocyanide, cyclohexyl isocyanide, piperidine, and tributylphosphine oxide), and L*Mo(CO)3 (L* = bis(methoxyethyl) ether and potassium hydridotris(pyrazoyl) borate). The enthalpy of deprotonation of H-Mo(CO)3C5H5 by NaC5H5 has been measured and used to complete a thermochemical cycle comparing the heats of reaction of (toluene)Mo(CO)3 with C5H6 and NaC5H5. These results are combined with earlier data to yield enthalpies of ligand exchange: LnMo(CO)3 + n′L′ → L′n′Mo(CO)3 + nL which span over 50 kcal/mol and encompass a broad range of organometallic ligands. Factors involved in controlling Mo-L bond strengths are discussed.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry