SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF THE ETHYL-4,7-DIAZA-2,9-DECANEDITHIOLATO]OXORHENIUM(V) COMPLEX

The neutral and lipophilic complex -dimethyl-4,7-diaza-2,9-decanedithi o]oxorhenium(V) was synthesized and characterized by FT-IR, UV, mass a nd NMR spectroscopies, X-ray crystallographic analysis of the complex (C10H21N2OS2Re) showed that the complex crystallizes in the monoclinic space group C2/c with a=21.357(2), b=13.615(1), c=20.778(2) Angstrom, beta=98.648(3)degrees, V=5973.0(9) Angstrom(3), z=16. Detailed NMR st udies revealed that in CDCl3 and CD3OD solutions the amine proton of t he complex is labile and undergoes exchange between the two nitrogens of the complex, Evidence is presented that the nature of the exchange is intermolecular. In the presence of DCl, both in CD3OD and D2O solut ions, the complex is protonated on both nitrogens while in the presenc e of NaOD the complex is completely deprotonated. Protonation/deproton ation of the complex are completely reversible processes as evidenced by NMR. (C) 1998 Elsevier Science S.A.