ISSN:
0009-2940
Keywords:
Ferrocenylboranes
;
Chromium, (aniline)tricarbonyl-
;
Polynuclear complexes
;
Boron-nitrogen bridges
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The facile formation of boron-nitrogen bridges allows the one-step assembly of oligonuclear organometallic complexes. By the reaction of 1-(dibromoboryl)ferrocene (1a) and 1,1′-bis(dibromoboryl)ferrocene (1b) with 1-[(dimethylamino)methyl]ferrocene (2) and (η6-aniline)tricarbonylchromium derivatives (3, 4) dinuclear to pentanuclear units (5-10) were obtained. The homodimetallic compound FcBBr2-NMe2CH2Fc (5, Fc: ferrocene) closely resembles a propylene-bridged complex. Its dative B-N link is stable at temperatures as high as 100°C. Each of the heterooligonuclear aggregates 7-10 is tied together by covalent B-N bonds, which are isoelectronic with ethylene bridges. In FcB(Br)-N(Me)Bct [7, Bct: (η6-C6H5)Cr(CO3)] and 1,1′-Fc[B(Br)-N(Me)Bct]2 (9) B-N π bonding dominates over the N-Bct π interaction as indicated by spectroscopical data and an X-ray analysis of 9. The N-lithiated compounds BctNRLi (4a, b; R = H, Me) possess a remarkably increased N-Bct π donation compared to the protonated parent compounds, which results in a further perturbation of the local C3v symmetry of the (C6H5)Cr(CO3) framework.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19951281205
