The geometry of nitrosyl ligands. Preparation, reactions, and X-ray structure determination of [Os(NO)(CO)2(PPh3)2]+

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Abstract
OsH(CO)(NO)(PPh3)2 eliminates H2 when treated with acids HY (Y = ClO4, BF4, or PF6) in the presence of CO, forming [Os(NO)(CO)2(PPh3)2]Y; one carbonyl group is easily displaced from this cation by other ligands and an X-ray structure determination of [Os(NO)(CO)2(PPh3)2]ClO4, CH2Cl2 reveals trigonal bipyramidal geometry with a linear nitrosyl group.