Syntheses and molecular structures of the tridentate phosphine ligand 2-[Ph2P(CH2)3NCH]C6H4OH (HL) and its rhenium(V) complex [ReOCl2L]·0.25CH2Cl2
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 2,p. 657-661
- https://doi.org/10.1039/dt9900000657
Abstract
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.Keywords
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