In this work, a new cobalt(III) complex, [Co(HEAC)2]ClO4’”2.5H2O (1), with the HEAC, 2(2-(2-hydroxyethylamino)ethylamino)cyclohexanol, was prepared and identified by elemental analysis, FT-IR and UV-Vis spectroscopy, cyclic voltammetry and single-crystal X-Ray diffraction. The cobalt atom in the crystal structure of 1 has a distorted octahedral geometry by coordination of the four nitrogen and ...

In the title compound, trans,trans-[μ-(m-phenyl-ene)bis-(ethyne-1,2-di-yl)]bis-[chlorido(1,4,8,11-tetra-aza-cyclo-tetra-deca-ne)cobalt(III)]-trans,trans-[μ-(5-bromo-m-phenyl-ene)bis-(ethyne-1,2-di-yl)]bis-[chlorido(1,4,8,11-tetra-aza-cyclo-tetra-deca-ne)cobalt(III)]-tetra-phenyl-borate-acetone (0.88/0.12/2/4), [Co(2)(C(12)H(4))Cl(2)(C(10)H(24)N(4))(2)](0.88)[Co(2)(C(10)H(3)Br)Cl(2)(C(10)H(24)N(...

VT transition from the high-spin CoII to low-spin CoIII state was observed for complex (N-cyclo-hexyl-2-iminopyridine)(3,6-di-tert-butyl-o-benzosemiquinonato)(3,6-di-tert-butyl-catecholato)cobalt in both solid and liquid form. For first time we demonstrate a low-temperature nanosecond pump-probe XANES experiment revealing valence tautomeric solution of Co complex. Reversible induced under tempe...

Observations of the peculiar type Ia SN 1991bg in NGC 4374 collected at ESO–La Silla and Asiago are presented and discussed. The photometric coverage extends for 530 days and the spectroscopy for the first seven months after the explosion. The broad– band light curves in the early months have a narrower peak and a luminosity decline faster than other SNIa (14.6 and 11.7 mag×(100d) in B and V re...