Synthesis of rhodium(III) complexes with the chiral phosphine (<i>S</i>)-Ph<sub>2</sub>PCH<sub>2</sub>CHMeCH<sub>2</sub>OH.: Crystal structure of (<i>S</i><sub>Rh</sub><i>S</i><sub>C</sub>)-[(η<SUP>5</SUP>-C<sub>5</sub>Me<sub>5</sub>)RhCl(η<SUP>2</SUP>-PPh<sub>2</sub>CH<sub>2</sub>CHMeCH<sub>2</sub>OH-P,O)]BF<sub>4</sub>
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2001
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Abstract
Reaction of dinuclear complex [{(eta (5)-C5Me5)RhCl}(2)(mu -Cl)(2)] with the chiral phosphine (S)-Ph2PCH2CHMeCH2OH leads to the complex [{eta (3)-C5Me5)RhCl2(eta (1)-PPh2CH2CHMeCH2OH-P)] (1). Complex 1 reacts with NaH and T1BF(4) affording the chiral-at-metal rhodium compounds [(eta (5)-C5Me5)RhCl(eta (2)-PPh2CH2CHMeCH2O-P,O)] (2) and [(eta (5)-C5Me5)RhCl(eta (2)-PPh2CH2CHMeCH2OH-P,O)]BF4(3), respectively. Complex 2 has been alternatively prepared by reaction of [{(eta (5)-C5Me5)RhCl}(2)(mu -Cl)(2)] with the sodium salt Ph2PCH2CHMeCH2ONa. Complex 2 reacts with HBF, to give 3. The reaction of 3 with an excess of NaI affords the neutral complex [(eta (5)-C5Me5)RhI2(eta (1)-PPh2CH2CHMeCH2OH-P)] (4). All the complexes have been characterised by elemental analyses and multinuclear NMR spectroscopy. The crystal structure of complex 3 has been determined by X-ray diffraction. (C) 2001 Elsevier Science B.V. All rights reserved.
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rhodium, chiral-at-metal complexes, chiral bidentate ligand, chiral phosphine, crystal structures