Jj. Cherng et al., Synthesis and characterization of the new series of chromium-group 15 hydride complexes [Et4N](2)[HE{Cr(CO)(5)}(3)] (E = As, Sb), ORGANOMETAL, 19(3), 2000, pp. 213-215
The new series of trigonal-pyramidal chromium complexes [HE{Cr(CO)(5)}(3)](
2-) (E = As (Ia), Sb (Ib')) were obtained from the reactions of E2O3 (E = A
s, Sb) with Cr(CO)(6) in concentrated KOH methanolic solution. These are th
e first examples of group 6 complexes containing E-H fragments (E = As, Sb)
, and the hydrogens are shown to be more hydridic than. those in the relate
d iron complexes due to the more electropositive character of Cr.