Mono‐ and Dimetallic Cyano Complexes with {Mo(η3‐allyl)(CO)2(N−N)} Fragments

Abstract

AbstractTreatment of [MoCl(η3‐allyl)(CO)2(phen)] with NaCN in CH2Cl2/MeOH afforded [Mo(CN)(η3‐allyl)(CO)2(phen)] [allyl = C3H5 (1a); 2‐MeC3H4 (1b)] as the sole products (no products of cyanide attack on the allyl group were detected). Treatment of 1a,b with [Mo(OTf)(η3‐C3H5)(CO)2(phen)] and NaBAr′4 in CH2Cl2 yielded the compounds [{Mo(η3allyl)(CO)2(phen)}(μ‐CN){Mo(η3‐C3H5)(CO)2(phen)}]BAr′4 (2a,b). Analogous treatment of 1a with fac‐[M(OTf)(CO)3(bipy)] (M = Mn, Re) and NaBAr′4 resulted in the synthesis of [{Mo(η3‐C3H5)(CO)2(phen)}(μ‐CN){M(CO)3(bipy)}]BAr′4 (3, 4), in which the C and N atoms of the cyano bridge are bonded to Mo and M (M = Mn, Re), respectively. The linkage isomer of 4 (C and N atoms of the cyano group bonded to Re and Mo, respectively) (6) was prepared by treatment of [Re(CN)(CO)3(bipy)] (5) with [Mo(OTf)(η3‐C3H5)(CO)2(phen)] and NaBAr′4. Compounds 1a, 2b, 3, and 6 were characterized by X‐ray diffraction. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)