Synthesis of some new mono- and di-substituted o-carborane derivatives with thiolate and carbamate moieties: crystal structure of 1-(SNC5H4)-1,2-C2B10H11

Some new o-carborane derivatives of stoichiometry 1,2-(SR)(2)-1,2-C2B10H10 [SR=S2NC7H4, S2CNEt2] have been synthesised by reaction of 1,2-Li-2-1,2-C2B 10H10 with the corresponding disulfide derivatives RSSR (RSSR=(C7H4NS2)(2), 2,2'-dithiobis(benzothiazole); (Et,NCS,), tetraethylthiuram disulfide) in molar ratio 1:2. The reaction of 1-Li-2-(SiBuMe2)-Bu-t-1,2-C2B10H10 with RS SR (RSSR= (C5H4NS)(2), 2,2'-dithiodipyridine; (C7H4NS2)(2)) in molar ratio 1:1 has afforded the new mixed di-substituted compounds 1-SR-2-(SiBuMe2)-Bu -t-1,2-C2B10H10 (SR=SNC5H4; S2NC7H4). The reaction of 1-SNC5H4-2-(SiBuMe2)- Bu-t- 1,2-C2B10H10 with NBu4F in THF in molar ratio 1:2 has afforded the mo no-substituted derivative 1-SNC5H4-1,2-C2B10H10, whereas the treatment of 1 ,2-(C7H4NS2)(2)-1,2-C2B10H10 with NBu4F in THF in molar ratio 1:5 has led t o the partially degraded derivative NBu4[7,8-(S2NC7H4)(2)-7,8-C2B9H10]. The crystal structure of 1-SNC5H4-1,2-C2B10H11 has been determined by X-ray di ffraction. (C) 1999 Elsevier Science Ltd. All rights reserved.