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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)

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)
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)
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.
boron, carbonyl complexes, manganese, octahydrotriborate(2-), organophosphine ligands, rhenium, x-ray structureslow-temperature crystal, borohydride complexes, octahydrotriboratobis(triphenylphosphine)copper(i), ruthenatetraboranes, metalloboranes, rhenaborane
0277-5387
1627-1632
Beckett, M. A.
42da77d2-c5b1-4050-8e68-42c0cccb82fb
Brassington, D. S.
42256c93-6554-487e-a6f5-dd1cb4fab9ba
Coles, S. J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Gelbrich, T.
42309d69-eaf1-4bb7-ba2e-db61f338e370
Hursthouse, M. B.
57a2ddf9-b1b3-4f38-bfe9-ef2f526388da
Beckett, M. A.
42da77d2-c5b1-4050-8e68-42c0cccb82fb
Brassington, D. S.
42256c93-6554-487e-a6f5-dd1cb4fab9ba
Coles, S. J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Gelbrich, T.
42309d69-eaf1-4bb7-ba2e-db61f338e370
Hursthouse, M. B.
57a2ddf9-b1b3-4f38-bfe9-ef2f526388da

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).

Record type: Article

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.

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More information

Published date: 15 June 2003
Keywords: boron, carbonyl complexes, manganese, octahydrotriborate(2-), organophosphine ligands, rhenium, x-ray structureslow-temperature crystal, borohydride complexes, octahydrotriboratobis(triphenylphosphine)copper(i), ruthenatetraboranes, metalloboranes, rhenaborane

Identifiers

Local EPrints ID: 19901
URI: https://eprints.soton.ac.uk/id/eprint/19901
ISSN: 0277-5387
PURE UUID: 1b45db97-15a0-451f-8c6d-d85941c69c5e
ORCID for S. J. Coles: ORCID iD orcid.org/0000-0001-8414-9272

Catalogue record

Date deposited: 16 Feb 2006
Last modified: 20 Jul 2019 01:09

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