Correlation of 95Mo NMR chemical shifts, electronic absorption bands, and solvent donor numbers for some dimeric Mo2(O2CR)4L2 solvent adducts

Autor:	José Campo, Elmer C. Alyea
Rok vydání:	1998
Předmět:	Chloroform Chemical shift Photochemistry Quadruple bond Inorganic Chemistry Solvent chemistry.chemical_compound Crystallography chemistry Hexamethylphosphoramide Absorption band Donor number Materials Chemistry Physical and Theoretical Chemistry Absorption (chemistry)
Zdroj:	Polyhedron. 17:275-279
ISSN:	0277-5387
DOI:	10.1016/s0277-5387(97)00319-7
Popis:	The 95Mo NMR chemical shifts are reported for two series of solvent adducts of the dimeric molybdenum(II) complexes Mo2(O2CR)4L2 (R = CF3, But; L - solvent). The large deshielding effect (over 450 ppm for the R = CF3 series as the solvent changes from chloroform to hexamethylphosphoramide) correlates well with the donor number of the solvent. The lowest energy electronic absorption band corresponding to the δ−δ* transition also moves to longer wavelength with the more strongly coordinating solvents, which is consistent with weakening of the MoMo quadruple bond and the dominance of the ΔE parameter in the paramagnetic term which controls the magnitude of δ(95Mo).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::efcbd14410c668b8f875fd666075ac04 https://doi.org/10.1016/s0277-5387(97)00319-7 Zobrazit plný text záznamu Full Text from ScienceDirect