Issue 1, 1990

Polyhedral metallaphosphaborane chemistry: the preparation, molecular structure, and nuclear magnetic resonance study of [2-Ph-1,1-(PMe2Ph)2-closo-1,2-PtPB10H10], and some related chemistry

Abstract

The reaction of [B10H11PPh] with cis-[PtCl2(PMe2Ph)2] in CH2Cl2 yields the new closo twelve-vertex species [(PMe2Ph)2PtB10H10PPh](43% yield) and small quantities of the known nine-vertex arachno-[(PMe2Ph)2PtB8H12]. Crystals of the yellow, air-stable platinaphosphaborane are triclinic, space group P[1 with combining macron], with a= 961.8(1), b= 1 077.2(2), c= 1 661.4(2) pm, α= 108.67(1), β= 84.63(1), γ= 115.96(1)°, and Z= 2; the final R factor is 0.0212 for 3 702 observed reflections. Diffraction analysis shows that the cluster structure is based on a PtB10P icosahedron with the platinum and phosphorus atoms occupying adjacent positions. The metal-to-cluster bonding is rotationally fluxional with ΔG277ca. 58 kJ mol–1. Detailed n.m.r. data for [(PMe2Ph)2PtB10H10PPh], neutral B10H12PPh, and anionic [B10H11PPh] are presented, compared, and briefly discussed. In contrast to the platinum reaction, reaction of [B10H11PPh] with [{Rh(η5-C5Me5)Cl2}2] gives the known nido ten-vertex [6-(η5-C5Me5)-nido-6-RhB9H13] and two other products identified as the twelve-vertex closo dimetallaphosphaboranes [7-X-1-Ph-2,3-(η5-C5Me5)-closo-2,3,1 - Rh2PB9H8](X = Cl or H).

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1990, 73-79

Polyhedral metallaphosphaborane chemistry: the preparation, molecular structure, and nuclear magnetic resonance study of [2-Ph-1,1-(PMe2Ph)2-closo-1,2-PtPB10H10], and some related chemistry

S. R. Bunkhall, X. L. R. Fontaine, N. N. Greenwood, J. D. Kennedy and M. Thornton-Pett, J. Chem. Soc., Dalton Trans., 1990, 73 DOI: 10.1039/DT9900000073

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements