The asymmetric unit of the title coordination polymer, [Cu(C(18)H(16)Cl(2)N(2)O(2))](n), consists of a Schiff base complex in which the Cu(II) atom adopts a square-pyramidal coordination geometry, being coordinated by two N and two O atoms of symmetry-related ligands and by a third O atom from a complex related by an inversion center. In the structure, a crystallographic twofold rotation axis b...

The title Fe(III) complex, [Fe(C(22)H(32)N(4)O(2))]I, contains a six-coordinate FeN(4)O(2) cation in which the ligand is a reduced Schiff base resulting from the NaBH(4) reduction of the condensation product between salicylaldehyde and 1,5,8,12-tetra-azadodecane. In spite of the increased flexibility of the saturated backbone of the ligand compared to the Schiff base from which it was synthesiz...

In the crystal of the title compound, [Cd2Na2(C2H3O2)2(C21H24N2O4)2]·0.67C2H6O, the doubly deprotonated Schiff base ligand N,N',O,O'-chelates to the Cd(II) cation, which is also O,O'-chelated by the acetate ion. Two Cd-Schiff base units are connected to two Na(+) atoms to form the tetra-nuclear complex, in which the Cd(2+) and Na(+) cations show distorted octa-hedral coordinations. The asymmetr...

In the title complex, [SmZn(C(19)H(20)N(2)O(4))(NO(3))(3)(CH(3)OH)(2)]·2CH(3)OH, the Zn(II) ion is six-coordinated by two O atoms and two N atoms of the deprotonated Schiff base ligand and by two O atoms from methanol mol-ecules, forming a slightly distorted octa-hedral geometry. The Sm(III) ion is coordinated by six O atoms from three chelating nitrate ligands and four O atoms from the Schiff ...

Vibrational circular dichroism (VCD) spectroscopy was applied to study the structural change of a Ni(II) complex (denoted by [Ni(II)L]) with a chiral Schiff base ligand, (R)- or (S)-2,2'-bis(salicylideneamino)-1,1'-binaphthyl (denoted by H2L), in solution. The major signals in the mid-IR region were assigned on the basis of comparison with the DFT-calculated spectra. The complex transformed rev...

In the title complex, [NiSm(C(19)H(20)N(2)O(4))(NO(3))(3)(CH(4)O)(2)]·2CH(3)OH, the Ni(II) ion is coordinated by two O atoms and two N atoms of a deprotonated Schiff base ligand and by two O atoms of two methanol ligands in a slightly distorted octa-hedral geometry. The Sm(III) ion is coordinated by six O atoms from three chelating nitrate ligands and four O atoms from a Schiff base ligand in a...

The asymmetric unit of the title coordination polymer, [Cu(C(18)H(16)Br(2)N(2)O(2))](n), consists of a Schiff base complex in which a crystallographic twofold rotation axis bis-ects the central C-C bonds of the n-butyl spacers of the designated Schiff base ligands, making symmetry-related dimer units, which are twisted around Cu(II) atoms in a bis-bidentate coordination mode. In the crystal, th...

Three di-Schiff-base ligands, N,N 0-bis(salicylidene)-1,3-propanediamine (H2Salpn), N,N 0-bis(salicylidene)-1,3-pentanediamine (H2Salpen) and N,N 0-bis(salicylidine)-ethylenediamine (H2Salen) react with Ni(SCN)2 Æ 4H2O in 2:3 molar ratios to form the complexes; mononuclear [Ni(HSalpn)(NCS)(H2O)] Æ H2O (1a), trinuclear [{Ni(Salpen)}2Ni(NCS)2] (2b) and trinuclear [{Ni(Salen)}2Ni(NCS)2] (3) respec...

The tetra-nuclear title complex, [Ni4(C14H11NO2)4(CH3OH)4]·0.8CH3OH, has a distorted cubane topology shaped by four Schiff base ligands. The cubane [Ni4(μ3-O4)] core is formed via the O atoms from the Schiff base ligands. The octa-hedrally coordinated NiII ions occupy alternating vertices of the cube. Each NiII ion is coordinated by one O,N,O'-tridentate dianionic ligand, two O atoms of oxidoph...

In the title complex, [Ni(2)(C(14)H(17)NO(4))(2)(C(12)H(8)N(2))(2)]·4CH(3)OH·3H(2)O, the two Ni(II) ions are bridged by two Schiff base anions, leading to a dinuclear complex. One Ni(II) ion is six-coordinated by four O atoms and two N atoms of two tridentate Schiff base ligands derived from the condensation of l-isoleucine and o-vanillin. The other Ni(II) ion is six-coordinated by four N atoms...