Selectins are a family of lectins, that mediate tethering and rolling of leukocytes on endothelium in vascular shear flow. Mild periodate oxidation of the L-selectin ligand CD34, or L-selectin ligands on leukocytes, enhanced resistance to detachment in shear and decreased rolling velocity equivalent to an 8-fold increase in ligand density, yet had little effect on the rate of tethering. Enhance...

In the title compound, [Co(C(13)H(16)NOSe(2))(2)]·CH(3)CN, the Co(II) atom is four-coordinated by two N,O-bidentate Schiff base ligands, resulting in a distorted tetra-hedral coordination for the metal ion.

In the title complex, [Ni(C(15)H(14)NO)(2)], the Ni(II) atom is located on an inversion centre and is coordinated by two O and two N atoms from two symmetry-related bidentate Schiff base ligands in a slightly distorted square-planar geometry. The phenyl and benzene rings in the ligand mol-ecule form a dihedral angle of 72.79 (8)°.

In title compound, [Co(C(13)H(12)NO(2))(3)], the Co(III) ion is six-coordinated by three bidentate Schiff base ligands in a distorted octa-hedral environment. Adjacent complex mol-ecules are linked through C-H⋯O hydrogen bonds.

In the title complex, [Co(C(15)H(14)NO)(2)], the Co(II) atom, situated on an inversion centre, is coordinated by two O and two N atoms from two symmetry-related bidentate Schiff base ligands in a slightly distorted square-planar geometry. The two phenolate rings form a dihedral angle of 10.53 (2)°.

In the title compound, [Zn(C(12)H(11)N(2)O)(2)], the Zn(II) atom, lying on an inversion center, is coordinated by two O atoms and two N atoms from two salicylal Schiff base ligands in a distorted square-planar geometry. A three-dimensional network is formed by inter-molecular C-H⋯N hydrogen bonds and C-H⋯π contacts.

The title compound, [Zn(C(15)H(14)NO(2))(2)], contains a four-coordinate Zn atom located on a twofold rotation axis that exhibits a distorted tetra-hedral geometry by two phenolate O atoms and two azomethine N atoms of the Schiff base 2-methoxy-6-[(4-methyl-phen-yl)imino-meth-yl]phenolate ligands.

In the title compound, [Fe(C(14)H(12)NOSe(2))(2)], the Fe(II) ion (site symmetry ) is four-coordinated by two N,O-bidentate Schiff base ligands, resulting in a slightly distorted trans-FeN(2)O(2) square-planar coordination for the metal ion.

Complexes of the general formula [Ni2L2(l1,1-N3)2(N3)2] have been synthesised in good yields by reacting Ni(NO3)2 Æ 6H2O wit L in the presence of excess of sodium azide in methanol at room temperature. Here L is N,N-bis(2-pyridylmethyl)amine (L) an N-(2-pyridylmethyl)-N 0,N 0-diethylethylenediamine (L). The X-ray structures of both compounds reveal that the N,N,N coordina ing reduced Schiff bas...

In the title complex, [Zn(C(12)H(17)N(2)OSe(2))(2)], the Zn(II) ion is six-coordinated by two N,N',O-tridentate Schiff base ligands, resulting in a slightly distorted trans-ZnO(2)N(4) octa-hedral coordination for the metal ion.