Syntheses and characterisation of chloro(h3-allyl) dicarbonylmolybdenum(II) complexes of chiral and achiral ditertiaryphosphines

• Authors: Joe Jesu Raj , Devendra Pathak , Pramesh Kapoor
• Languages of publication: EN

Abstracts

EN

A series of the complexes of the general formula [ClMo(CO)2(η
3-C3H5)(P-P)], [where (P-P) = (m-CH3C6H4)2P(CH2)2PPh2 (m-t-dppe); cis-Ph2PCH=CHPPh2 (cis-diphos); Ph2PCH2CH2AsPh2 (arsaphos); Ph2P(CH2)4PPh2 (dppb); (±)-1,2-C6H4(PMePh)2 (rac-diphos); (2R,3R)Ph2PC*H(Me)C*H(Me)PPh2 (+)-chiraphos; (R,R)-Me2C(O)2{C*HCH2PPh2}2 (-)-diop] were synthesised by the reaction of the precursor complex [ClMo(CO)2(η
3-C3H5)(CH3CN)2] with the corresponding ditertiary phosphine in acetone. The complexes were isolated as yellow to orange air-stable solids and characterised by elemental analyses, FTIR and multinuclear NMR [1H, 31P{1H}] spectroscopic techniques. The carbonyl force constant values were calculated by Cotton and Kraihanzel approximate secular equations using ν
C≡O stretching frequencies observed in the FTIR and these were found to be 14.30–14.59 mdyne 0-A−1 and 0.23–0.70 mdyne Å−1 for K1 and Ki respectively. Spectroscopic evidences have confirmed cis-octahedral structures for the synthesized complexes.

Keywords

EN

Chelating ligands; phosphines; carbonyl force constants; Cotton and Kraihanzel approximations and allylic moiety

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2012
• Volume: 10
• Issue: 1
• Pages: 165-171

Dates

published

1 - 2 - 2012

online

24 - 11 - 2011

Contributors

author

Joe Jesu Raj

• Institut National de la Recherche Scientifique (INRS)

author

Devendra Pathak

• University of Delhi

author

Pramesh Kapoor

• Indian School of Mines

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Identifiers

DOI

10.2478/s11532-011-0120-9