Synthesis and characterisation of a series of Group 7 metal 2,2,2,2-dicarbonylbis(triorganophosphine)-arachno-2-metallatetraboranes, M(CO)(2)L-2(B3H8) (M=Re, Mn); crystal and molecular structures of Re(CO)(2)(dppf)(B3H8) and Mn(CO)(2)(dppe)(B3H8)


Beckett, M. A., Brassington, D. S., Coles, S. J., Gelbrich, T. and Hursthouse, M. B. (2003) Synthesis and characterisation of a series of Group 7 metal 2,2,2,2-dicarbonylbis(triorganophosphine)-arachno-2-metallatetraboranes, M(CO)(2)L-2(B3H8) (M=Re, Mn); crystal and molecular structures of Re(CO)(2)(dppf)(B3H8) and Mn(CO)(2)(dppe)(B3H8). Polyhedron, 22, (12), 1627-1632. (doi:10.1016/S0277-5387(03)00289-4).

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Description/Abstract

Arachno-2-metallatetraboranes, [M(CO)(2)L-2(B3H8)] (M = Re, L = PPh3, P(C6H4Cl-4)(3), P(C6H4OMe-4)(3), P(CH2Ph)(3); M = Mn and Re, L = 1/2dppm, 1/2dppp, 1/2dppb, 1/2dppf; M = Mn, L = 1/2dppe), have been synthesised from reactions of [NBu4][B3H8] with fac, cis-[MBr(CO)(3)L-2.] under photolytic conditions. These compounds were characterised by NMR (H-1, B-11, P-31) and IR spectroscopy. [Mn(CO)(2)(dppe)(B3H8)] and [Re(CO)(2)(dppf)(B3H8)] were further characterised by single-crystal X-ray diffraction studies. These studies confirmed molecular Cs symmetry and a trans dicarbonyl arrangement. Similar reactions with the bis(monodentate) organophosphine complexes, mer, trans-[MnBr(CO)(3)L-2], did not yield isolatable arachno-2-metallatetraboranes.

Item Type: Article
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Keywords: boron, carbonyl complexes, manganese, octahydrotriborate(2-), organophosphine ligands, rhenium, x-ray structureslow-temperature crystal, borohydride complexes, octahydrotriboratobis(triphenylphosphine)copper(i), ruthenatetraboranes, metalloboranes, rhenaborane, manganese
Subjects: Q Science
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Chemistry
ePrint ID: 19901
Date Deposited: 16 Feb 2006
Last Modified: 27 Mar 2014 18:09
URI: http://eprints.soton.ac.uk/id/eprint/19901

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