BORABENZENE DERIVATIVES .26. SYNTHESES OF 1-METHYLBORATABENZENE COMPLEXES OF TITANIUM, ZIRCONIUM, AND HAFNIUM - STRUCTURES OF TICL3(C5H5BME), TICL2CP(C5H5BME), ZRCL2(C5H5BME)(2), AND ZRCL2CP-ASTERISK(C5H5BME)

Authors
HERBERICH GE ENGLERT U SCHMITZ A
Citation
Ge. Herberich et al., BORABENZENE DERIVATIVES .26. SYNTHESES OF 1-METHYLBORATABENZENE COMPLEXES OF TITANIUM, ZIRCONIUM, AND HAFNIUM - STRUCTURES OF TICL3(C5H5BME), TICL2CP(C5H5BME), ZRCL2(C5H5BME)(2), AND ZRCL2CP-ASTERISK(C5H5BME), Organometallics, 16(17), 1997, pp. 3751-3757
Citations number
51
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Organometallics → ACNP
ISSN journal
02767333
Volume
16
Issue
17
Year of publication
1997
Pages
3751 - 3757
Database
ISI
SICI code
0276-7333(1997)16:17<3751:BD.SO1>2.0.ZU;2-B
Abstract
The complexes TiCl3(C5H5BMe) (6a), [MCl3(C5H5BMe)](x) (6b, M = Zr; 6c, M = Hf), and MCl2(C5H5BMe)(2) (7b, M = Zr; 7c, M = Hf) are obtained f rom the tetrachlorides MCl4 (M = Ti, Zr, Hf) and Li(C5H5BMe) (3), 2-(M e3Si)C5H5BMe (4), or 2-(Me3Sn)C5H5BMe (5) in excellent yields. The com plexes MCl2Cp(C5H5BMe) (8a, M = Ti; 8b, M = Zr) and MCl2Cp(C5H5BMe) ( 9b, M = Zr; 9c, M = Hf) are made similarly from the corresponding cycl opentadienyl precursors MCl3Cp (M = Ti, Zr) and MCl3Cp (M = Zr, Hf). The redox potentials are shifted by 0.35-0.41 V to more anodic values than those for the corresponding Cp complexes. Molecule 6a shows a pia no-stool-type structure, while 7b, 8a, and 9b possess typical bent san dwich structures.