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Title: CpCr(CO)3 ■-initiated N-N bond cleavage in a thiotetrazole ligand in a cyclopentadienylchromium complex
Authors: Ng, V.W.L.
Weng, Z. 
Vittal, J.J. 
Koh, L.L. 
Tan, G.K.
Goh, L.Y. 
Keywords: Cubanes
Issue Date: 1-Mar-2005
Citation: Ng, V.W.L., Weng, Z., Vittal, J.J., Koh, L.L., Tan, G.K., Goh, L.Y. (2005-03-01). CpCr(CO)3 ■-initiated N-N bond cleavage in a thiotetrazole ligand in a cyclopentadienylchromium complex. Journal of Organometallic Chemistry 690 (5) : 1157-1165. ScholarBank@NUS Repository.
Abstract: The tetrazolylthiolato complex CpCr(CO)3(STz) (4a) was obtained from the facile reaction between [CpCr(CO)3]2 (Cp = C 5H5) (1) and 5,5′-dithiobis(1-phenyl-1H-tetrazole), (abbrev. (PhN4CS)2 or (STz)2). Further reaction of 4a with 1 under thermolytic conditions led to isolation of low yields of the cubane-like complexes Cp4Cr4S3(μ 3-N3Ph) (5), Cp4Cr4S 2(μ3-CO)(μ3-NC≡CrCp(CO) 2) (6), Cp4Cr4S2(μ3- N3Ph)(μ3-NC≡CrCp(CO)2) (7) and Cp 4Cr4SO2(μ3-NPh) (8), containing μ3-phenyltriazenido, imidocarbyne and phenylimido groups at the corners of cuboids, in addition to μ3-sulfide, oxo or carbonyl groups. The predominant products were the decarbonylation derivative of 1, i.e. [CpCr(CO)2]2(Cr≡Cr) (9), together with [CpCr(CO)2]2S (10) and its thermolytic cuboidal derivatives, mainly Cp4Cr4S2O2 (11) and Cp4Cr4S4 (13). 1-initiated homolytic fragmentation of the tetrazole ring was proposed to rationalize the formation of the derived cubanes. The structures of the complexes 4a, 6-8 and 11 have been determined by single X-ray diffraction analysis. © 2004 Elsevier B.V. All rights reserved.
Source Title: Journal of Organometallic Chemistry
ISSN: 0022328X
DOI: 10.1016/j.jorganchem.2004.11.045
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