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Complexes of the (Tetramethylcyclobutadiene)cobalt Fragment with Boratabenzene Ligands and an Unprecedented Formation of a Borabenzene Complex − Structures of (C4Me4)Co(3,5-Me2C5H3BSnMe3) with an Sn−B Bond and of the Dinuclear Complex [(C4Me4)Co(3,5-Me2C5H3B)]2O

✍ Scribed by Gerhard E. Herberich; Tushar S. Basu Baul; Ulli Englert

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
294 KB
Volume
2002
Category
Article
ISSN
1434-1948

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✦ Synopsis

The yellow-orange boratabenzene complex Cb*Co(3,5-Me 2 C 5 H 3 BNMe 2 ) (1) (Cb* = C 4 Me 4 ) was readily obtained from [Cb*Co(NCMe) 3 ]PF 6 and Li(TMEDA)(3,5-Me 2 C 5 H 3 BNMe 2 ). Methanolysis of 1 afforded Cb*Co(3,5-Me 2 C 5 H 3 BOMe) (2). Complex 2 reacted with MeLi and with BCl 3 to give the B-methyl analogue 3 and the B-chloro compound 4, respectively. The chloro compound 4 reacted with iBu 2 AlH, TlF, and LiSnMe 3 to afford the B-hydrido derivative 5, the B-fluoro complex 6, and the B-(trimethylstannyl) compound 7, respectively. A single-crystal structure determination of 7 gave an Sn-B bond length of 2.236(5) A ˚. The

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