105103-36-4Relevant academic research and scientific papers
Synthesis and reactivity studies of phosphido-bridged heterobimetallic Cr-Os and Fe-Os formyl complexes
Rosenberg, Steven,Lockledge, Scott P.,Geoffroy, Gregory L.
, p. 2517 - 2522 (2008/10/08)
The new bimetallic complexes (CO)3Fe(μ-PPh2)2Os(CO)3 (1), (CO)4Cr(μ-PPh2)2Os(CO)3 (2), and (CO)4Cr(μ-PPh2)2Os(CO) 3(PMePh2) (3) have been prepared and spectroscopically characterized. Stable bimetallic formyl complexes [(CO)3Fe(μ-PPh2)2Os(CO) 2(CHO)]- (4) and [(CO)4Cr(μ-PPh2)2Os(CO) 2(PMePh2)(CHO)]- (5) derive from 1 and 3 upon treatment with Li[BHEt3]. Formyl complex 5 exists in two isomeric forms which appear to be geometrical isomers with the formyl ligand located in different coordination positions in the Os octahedral coordination sphere. Formyl complex 4 is unusual in that it is one of the few examples of a stable formyl complex with a metal-metal bond, and reasons for its unusual stability are discussed. Formyl complex 5 reacts with [(CH3)3O]BF4 to give (CO)4Cr(μ-PPh2)(η2(P,C)-μ-PPh 2CH(OMe))Os(CO)2(PMePh2) (8) containing the μ-PPh2CH(OMe) ligand which derives from coupling of phosphide and methoxycarbene ligands, the latter being formed by methylation of the formyl oxygen.
