Nickel Coordination Compounds of Stanna-closo-dodecaborate

The reaction of the nickel complexes [(dppm)NiBr2] [dppm = 1,1-bis(diphenylphosphanyl)methane] and [(dppe)NiBr2] [dppe = 1,2-bis(diphenylphosphanyl)ethane] with stanna-closo-dodecaborate [Bu3NH](2)[SnB11H11] (1) yielded the trigonal-bipyramidal coordination compounds [Bu3NH](4)[(dppm)Ni(SnB11H11)(3)](2) and [Bu3NH](4)[(dppe)Ni(SnB11H11)(3)] (3). The square-planar compound [Bu3NH](2)[(ImiPr(2)Me(2))(2)Ni(SnB11H11)(2)] (4) (ImiPr(2)Me(2) = 1,3-diisopropyl-4,5-di-methyl-imidazoliumylidene) could be obtained by the reaction of the N-heterocyclic carbene complex [(ImiPr(2)Me(2))(2)NiBr2] with [Bu3NH](2)[SnB11H11] (1). The new coordination compounds were characterized by heteronuclear NMR spectroscopy and single-crystal X-ray structure analysis. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).