Syntheses, rearrangements, and structural analyses of unsaturated nitrogen donor ligands derived from diphenyldiazomethane and the chiral rhenium Lewis acid [(5-C5H5)Re(NO)(PPh3)]. Academic Article uri icon


  • Diphenyldiazomethane and a labile chlorobenzene complex of [(5-C5H5)Re(NO)(PPh3)]+ BF4- react to give the 1 adduct [(5-C5H5)Re(NO)(PPh3)(NNCPh2)]+ BF4- (73%). When this is conducted in the presence of copper powder, a 3-phenyl-1H-indazole complex derived from carbon-hydrogen bond activation, [(5-C5H5)Re(NO)(PPh3)(NC(Ph)CCHCHCHCHCNH)]+ BF4-, is obtained (65%). Subsequent reaction with NaOCH3 gives indazolyl complex (5-C5H5)Re(NO)(PPh3)(NCCHCHCHCHCC(Ph)N) (85%), derived from NH deprotonation and a 1,2-rhenium shift. Crystal structures of the three new complexes are determined. DFT calculations are used to probe the mechanism of the 1,2-shift and energetics of alternative Re-N rotamers and linkage isomers, and assign bond orders and dominant resonance formulations.

published proceedings

  • Dalton Trans

author list (cited authors)

  • Estrada, A. L., Wititsuwannakul, T., Kromm, K., Hampel, F., Hall, M. B., & Gladysz, J. A.

citation count

  • 2

complete list of authors

  • Estrada, Alexander L||Wititsuwannakul, Taveechai||Kromm, Klemenz||Hampel, Frank||Hall, Michael B||Gladysz, John A

publication date

  • May 2022