A new series of half-sandwich
(borylcyclopentadienyl)titanium trichloride complexes
have
been prepared which include the boryl substituents
[1,2-(C6H4O2)]B−,
Ph(Cl)B−, Ph2B− and
a (PhB<)-bridged bimetallic complex. No correlation was found
between the 1H and 13C
NMR chemical shifts of the cyclopentadienyl ring in these complexes and
the Lewis acidity
of the attached boryl group. The crystal structure of the
phenylboron-bridged bimetallic
complex
PhB{(η5-C5H4)TiCl3}2
was determined. The cyclopentadienyltitanium units of
the
molecule are twisted away from each other, forming an angle of 41°
between the
cyclopentadienyl ring planes. Each cyclopentadienyl ring is
twisted out of the trigonal plane
of the boron by 24°. Preliminary results concerning the
Ti-alkylation of some of these
complexes are described.
Organo-iron compoundsOrgano-iron compounds S 7100 Syntheses and Crystal Structures of Ferrocenyl Derivatives of Biphenyl. -(LEMENOVSKII*, D. A.; MAKAROV, M. V.; DYADCHENKO, V. P.; BRUCE, A. E.; BRUCE, M. R. M.; LARKIN, S. A.; AVERKIEV, B. B.; STARIKOVA, Z. A.; ANTIPIN, M. Y.; Russ. Chem. Bull. 52 (2003) 3, 607-615; Dep. Chem., Lomonosov Moscow State Univ., Moscow 119992, Russia; Eng.) -M. Kowall 41-180
The reaction of ClAuPPh3 and 1,1'-biphenyl-2,2'-dithiol in the presence of trimethylbenzylammonium chloride and K2CO3 in a tetrahydrofuran/methanol solution gives the title complex, [Au2(C12H8S2)(C18H15P)2]. The molecule contains P-Au-S units which 'cross' with torsion angles of approximately 90 degrees [P-Au-Au-P = 86.23 (5) degrees and S-Au-Au-S = 95.62 (5) degrees]. The intra- and intermolecular Au.Au distances [3.9064 (3) and 6.3797 (5) A, respectively] are outside the range for typical Au...Au interactions. However, the Au atoms appear to be drawn together, leading to a significant bending of the P-Au-S angles [170.24 (5) and 169.52 (5) degrees].
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