Structural and spectroscopic studies of bis(pentacarbonylmanganese)diphenyltin(IV) and bis(pentacarbonylmanganese)diphenyllead(IV)

Solid-state nuclear magnetic resonance and vibrational spectroscopic studies are reported for bis(pentacarbonylmanganese)diphenyltin(IV) and bis(pentacarbonylmanganese)diphenyllead(IV). The solid-state, CP-MAS, 119 Sn and 207 Pb NMR spectra of these complexes each reveal a single asymmetric undecet due to the 1 J 119 Sn‐ 55 Mn and 207 Pb‐ 55 Mn spin‐spin couplings and second-order quadrupole‐dipole effects. The 1 JSn‐Mn and 1 JPb,-Mn values are 139 ^ 1a nd 228^ 1H z; respectively. The 119 Sn and 207 Pb chemical shift anisotropies have been determined. The crystal structure of the tin compound has been re-examined. q 2001 Elsevier Science B.V. All rights reserved.