Formation of three-bridge cobalt-copper commo-cluster with the (B-H)3•••Cu bond in the reaction of [Cs][commo-3,3′-Co(1,2-C2B9H11)2] with copper(I) and copper(II) compounds

Zwitterionic 4,8,8'-exo-{Ph3PCu}-4,8,8'-(mu-H)(3)-commo-3,3'-Co(1,2-C2B9H9)-(1',2'-C2B9H10) and ionic [(PPh3)(3)Cu][commo-3,3'-Co(1,2-C2B9H11)(2) complexes were synthesized in moderate yields by the reaction of anionic commo-complex [Cs][commo-3,3'-Co-(1,2-C2B9H11)(2)]) in a CH2Cl2 solution with anhydrous CuCl2 or CuCl in the presence of PPh3. The complexes were also synthesized by alternative methods and characterized by NMR and X-ray diffraction methods.