Complexes of Oxorhenium(V) with Aromatic 2-Amino-Alcohols

Novel p-tolylimido rhenium(V) complexes incorporating quinoline-2-carboxylate ion – Synthesis, X-ray studies, spectroscopic characterization and DFT calculations

“…only some C-HÁÁÁX, C-HÁÁÁO and C-HÁÁÁN of small importance weak inter-and intra-molecular hydrogen bonds exist [37,38]. The molecular structures of 1a and 1b are presented in Figs [29][30][31][32][33][34][35][36]. The interatomic distance between the rhenium atom and the oxygen atom of quin-2-COO À ligand is almost equal to an ideal single Re-O bond length (ca.…”

“…Similar to the related imido complexes it is extremely difficult to identify the Re-NC 6 H 4 CH 3 stretches in the IR spectra of 1a, 1b, 2a and 2b, as they may be mixed with m C@N and m P-C modes of PPh 3 and quin-2-COO À ligands [29][30][31][32][33][34][35][36]. The experimental vibrational spectra of 1a and 1b are compared to the calculated (non-scaled) ones ( Figs.…”

Synthesis and structural characterization of cationic octahedral oxorhenium(V) complexes with bidentate imidazole derivatives

“…This is mainly the result of increased -back bonding in the Re-P bond, which is the result of the good -donicity properties of the aliphatic N(3) atom. With a chlordie trans to a PPh 3 , the average Re-P distance [21] is much shorter at 2.414(4) Å . The Re-N(1) bond (2.106(5) Å ) is also shorter than the Re-N(3) bond (2.226(6) Å ), thereby reflecting the multibond character of the rhenium to aromatic imidazolyl nitrogen bond.…”

The reaction of [ReIIICl3(t-BuNC)(PPh3)2] with aniline derivatives: Isolation of imido-Re(V) complexes and a Re(III) complex containing iminobenzoquinonate as ligand

“…With H 2 ap the complex [ReOCl 2 (Hap)(PPh 3 )] was isolated, with the bidentate coordination of Hap À via the acetato oxygen and neutral amino nitrogen [32,33]. The reaction with anthranilic acid (H 3 aa) formed [Re(aa)Cl(OEt)(PPh 3 ) 2 ], with coordination of aa 3À in a bidentate manner via the acetato oxygen and imido nitrogen [34].…”