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Syntheses and molecular structures of the tridentate phosphine ligand 2-[Ph 2 P(CH 2 ) 3 NCH]C 6 H 4 OH (HL) and its rhenium( V ) complex [ReOCl 2 L]·0.25CH 2 Cl 2

1990; Royal Society of Chemistry; Issue: 2 Linguagem: Inglês

10.1039/dt9900000657

2050-5671

Hilary J. Banbery, Wasif Hussain, Thomas A. Hamor, Christopher J. Jones, Jon A. McCleverty,

Chemical Synthesis and Analysis

The tridentate ligand 2-[Ph2P(CH2)3NCH]C6H4OH (HL), which contains both 'hard' and 'soft' potential donor atoms, has been synthesized. Single-crystal X-ray diffraction studies show that, in the solid state, this ligand adopts a structure in which the oxygen and nitrogen atoms are linked by an intramolecular hydrogen bond. The reaction of this material with [ReOCl4]– to form [ReOCl2L] leads to the replacement of the proton in this hydrogen bond by rhenium(V), and the folding of the trimethylene chain to bring the phosphorus atom [Re–P 2.442(5)Å] into a position which allows the ligand to bind facially to the {ReO}3+ moiety through all three donor atoms. The co-ordination site trans to the ReO oxygen [Re–O = 1.711 (13)Å] is occupied by the phenolic oxygen [Re–O = 1.965(13)Å] and the rhenium atom has a distorted octahedral co-ordination environment.