Synthesis and crystal and molecular structure of the 2:1 molecular adduct between N,N'-(1,2-phenylene)bis(salicylaldiminato)copper(II) and 7,7,8,8-tetracyanoquinodimethane

Large Second-Order Optical Nonlinearities in Open-Shell Chromophores. Planar Metal Complexes and Organic Radical Ion Aggregates

“…( N , N‘ -Bis(salicylidene)-1,2-phenylenediamino)M(II) Complexes [M(salophen); M = Cu, Co]. Cu(salophen) (1) possesses a planar structure , and is paramagnetic (d 9 ), having a single unpaired electron. , The experimental optical spectrum in relatively nonpolar chloroform solution 14 and calculated INDO/SCI-derived electronic transitions for the 2 A 2 [(d x y ) 1 ] ground state 21 of 1 are compared in Figure . The agreement between calculated and experimental data is very good, in terms of both energy and relative intensities (oscillator strengths).…”

“…( 1 18,19 and is paramagnetic (d 9 ), having a single unpaired electron. 20,21 The experimental optical spectrum in relatively nonpolar chloroform solution 14 and calculated INDO/SCI-derived electronic transitions for the 2 A 2 [(d xy ) 1 ] ground state 21 of 1 are compared in Figure 1.…”

“…Metrical parameters used for the calculations of M(salophen) complexes 1 and 2 were taken from crystal structure data, ,, assuming a C 2 v planar geometry. Analogously, for substituted Co(II) complex 4 , a planar structure was assumed.…”

Complexes of a Quadridentate Schiff Base Ligand Derived fromo-Phenylenediamine and 2-Formylcyclohexanone with Ni(II), Cu(II), Co(II), Zn(II), Pb(II) and UO2(VI)

“…The d a r e d spectrum of the ligand showed a broad absorption band around 3380 cm-1 which may be due to hydrogen bonded v(0H) in structure (11) or v(NH) in (111). More definite evidence for the presence of acidic protons may be deduced from the 'H NMR spectrum.…”

{2,2′-[1,2-Phenylenebis(nitrilomethylidyne)]diphenolato}copper(II) dichloromethane solvate

“…2,2 H -[1,2-Phenylenebis(nitrilomethylidyne)]diphenol (L18) is a well known Schiff base which can act as a tetradentate ligand, and its square-planar copper complex has been described as an isolated molecule in a number of crystalline forms, both on its own (Suresh et al, 1996), (1), as well as stabilized by a variety of different solvates, e.g. water [(2); Yao et al, 1997], thiourea [(3); Ferrari et al, 1976] and tetracyanoquinodimethane [(4); Cassoux & Gleizes, 1980]. During the synthesis of a heteronuclear Cu±Gd(L18) complex, we obtained some crystals which happened to be a new unreported form of the Cu(L18) complex, (I), this time stabilized by a molecule of CH 2 Cl 2 , and which we report herein.…”