New synthetic routes to some nitrosyl rhenium complexes. Crystal, molecular and electronic structure of [ReCl3(NO)(PPh3)2] and [ReCl2(CO)(NO)(PPh3)2] complexes

X-ray crystal structure, EPR and electrochemical studies of two novel cyanonitrosylrhenates: K2[Re(NO)(CN)5]·(Phen)6·4.5H2O and K[Re(NO)(H2O)(CN)4]·(Phen)5·CH3OH·3H2O

“…To the best of our knowledge there exists a single report on the structural characterization of cyanonitrosyl rhenate in the literature [8]. This seems to be striking as a host of neutral halogeno nitrosyl complexes of rhenium with coordinated phosphine ligands are structurally well characterized [9][10][11].The compound 1 behaves as a 2:1 electrolyte whereas 2 as a 1:1 electrolyte [12] supporting the formulation of the complexes. In complexes 1 and 2 the m(CN) vibration remains at identical position, but the m(NO) band in 1 appears at a higher wave number than that at 2 [6].…”

“…To the best of our knowledge there exists a single report on the structural characterization of cyanonitrosyl rhenate in the literature [8]. This seems to be striking as a host of neutral halogeno nitrosyl complexes of rhenium with coordinated phosphine ligands are structurally well characterized [9][10][11].…”

Synthesis, crystal, molecular and electronic structure of rhenium nitrosyl with pyrazole in the coordination sphere

“…Due to the favourable nuclear properties of 186 Re and 188 Re nuclides in diagnostic nuclear medicine and radioimmunotherapy, the chemistry of nitrosyl rhenium complexes arouses particular interest [15,16]. [17][18][19][20][21][22][23][24][25].Here, we present the synthesis, spectroscopic characterization, crystal, molecular and electronic structure of a new rhenium nitrosyl with pyrazole (pzH) in a coordination sphere -[ReBr 3 (NO)(PPh 3 )(pzH)]. The electronic 1387-7003/$ -see front matter Ó…”

“…The [ReOX 3 L 2 ] compounds (X = Cl and Br, L = PPh 3 , AsPh 3 , 1/2 dppe) easily reacts with gaseous nitric oxide to give a variety of products depending on the reaction conditions: [ReX 3 [17][18][19][20][21][22][23][24][25].…”

“…The rhenium atom is in a distorted octahedral environment with the bromine ligands in meridional geometry and the linear N-O group is trans to the pyrazole molecule and cis to the PPh 3 ligand. The nitrosyl group of the starting complex occupies the trans position to one of the bromine [17][18][19][20][21][22][23][24][25]. The linearly bonded nitrosyl ligand is a poor r-donor and a very strong p-acceptor.…”