Hydrido Complexes of Cobalt with Bis phosphines

CoBr2 -4H20 + 2diphos------- CoBr2(diphos)2 + 4H20 

Submitted by V. D. BIANCO S. DORONZO, and N. GALLO Checked by H. BONNEMANNt and M. SAMSON+ 

The preparation is carried out under dry, oxygen-free nitrogen and the product is manipulated in the absence of air. 

Hydridobis[ s-vinylenebis(diphenylphosphine)] cobalt(l) is a red crystalline solid that is unstable in air both in the solid state and in solution. The complex is soluble in tetrahydrofuran (9.2 X 10-3 mole/L, at 20°), toluene (10.2 X 10 3 mole/L), chloroform (6.3 X 10-3 mole/L), dichloromethane (1.6 X 10-3 mole/ L), and benzene (8.4 X 10-3 mole/L). It is insoluble in ethanol, diethyl ether, acetone, and pentane. The infrared spectrum in Nujol mull shows a band at 1885 (m) cm-1, attributable to the Co-H stretching vibration. 

Zing ales, F. Canziani, and A. Chiesa, Inorg. Chem., 2,1303 (1963). 

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