Solvation isomers of solvated adducts of copper and zinc diethyldithiocarbamate complexes in the M(II)-EDtc-Py-Mf systems : synthesis, EPR, and solid-state C-13 and N-15 CP/MAS NMR

• The crystalline adducts [M(B)(EDtc)(2)] (M = Zn, Cu; B = Py, Mf) quantitatively absorb bases to produce their solvated forms incorporating outer-sphere molecules of N-donor bases: [M(Mf)(EDtc)(2)] . Mf, [M(Mf)(EDtc)(2)] . Py, and [M(Py)(EDtc)(2)] . Mf. The adducts of the last two types ire solvate isomers, which differ in the distribution of different bases between the outer and inner coordination spheres, Computer simulation points to the individual character of the EPR spectra of the isomers [Cu(Mf)(EDtc)(2)] . Py and [Cu(Py)(EDtc)(2)] . Mf and the lack of redistribution of base molecules between two coordination spheres. The copper coordination polyhedra in these compounds are close to a trigonal bipyramid (the TBP contribution is about 80%); the ground state of the unpaired electron is dominated by the 3d(z2) copper(II) AO. Combined analysis of C-13 and N-15 NMR data permitted the identification of the signals that arise from the coordinated and outer-sphere pyridine molecules in the solvate isomers [Zn(Mf)(EDtc)(2)] . Py and [Zn(Py)(EDtc)(2)] . Mf.

Ämnesord

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)

Nyckelord

Chemistry of Interfaces

Gränsytors kemi

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)