A correlation study: 13C, 17O, 29Si and 31P NMR chemical shifts and approximate CO stretching force constants for cis-disubstituted molybdenum carbonyl complexes

Academic Article

Abstract

  • The C, O, Si and P NMR spectral properties of cis-Mo(CO) (PPh X) , where X is Cl, OMe, 4-MeC H O, NH , NHMe, NHCH CH NH , NHCH CH NMe , 4-MeC H NH, SEt, OSiMe or NHSiMe and of cis-Mo(CO) )(PPh YPPh ), where Y is NMeCH CH CH NMe, NHSiMe NH, NHSiMePhNH, OSiMe O, or OSiMePhO and of cis-[Mo(CO) (PPh O) ] Si have been determined. Good to excellent correlations between the C and O chemical shifts of carbonyl ligands trans to the phosphorus donor ligands are found. Only poor correlations are seen between C and C chemical shifts for carbonyl ligands cis to the two phosphine substituted carbonyl groups. Based on only seven samples, Si and C of trans carbonyl ligands also correlate well. Correlations of chemical shift data with approximate CO stretching force constants are fair to good depending upon the selection of data. In particular, much better correlations are noted in almost all instances when complexes with monodentate ligands and bidentate ligands are examined separately. © 1983. 13 17 29 31 13 17 13 17 29 13 4 2 2 6 4 2 2 2 2 2 2 2 6 4 3 3 4 2 2 2 2 2 2 2 4 2 2 2
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    Digital Object Identifier (doi)

    Author List

  • Gray GM; Kraihanzel CS
  • Start Page

  • 201
  • End Page

  • 214
  • Volume

  • 241
  • Issue

  • 2