Cobalt complexes of a selenium diimide and a tellurium diimide dimer |
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| Authors: | Maarit Risto Jari Konu Raija Oilunkaniemi Risto S. Laitinen Tristram Chivers |
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| Affiliation: | 1. Department of Chemistry, University of Oulu, P.O. Box 3000, FI-90014, Finland;2. Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4 |
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| Abstract: | [CoCl2{N,N′-Te2(NtBu)4}] (1) was obtained in good yields by the reaction of equimolar amounts of (tBu)NTe(μ-NtBu)2TeN(tBu) and CoCl2 in toluene under an argon atmosphere. The crystal structure of 1·CH2Cl2 showed that the dimeric tellurium diimide ligand is N,N′-chelated to cobalt. The related reaction of Se(NtBu)2 and CoCl2 affords a green product tentatively identified as a 1:1 adduct [CoCl2{N,N′-Se(NtBu)2}] (CHN analysis). However, recrystallization from thf produces the ion-separated complex [Co2(μ-Cl)3{N,N′-Se(NtBu)2}2(thf)2][CoCl3{NH2(tBu)}]·1½thf (2·1½thf), in which the monomeric selenium diimide ligand is N,N′-chelated to cobalt in the cation. A pathway for the formation of 2 from [CoCl2{N,N′-Se(NtBu)2}] in thf is proposed. |
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| Keywords: | Tellurium diimide dimer Selenium diimide Cobalt complexes X-ray crystallography 1H NMR spectroscopy |
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