Biomedical subjects
XB Leng
Publications and source records attributed to XB Leng.
Chloro(2-
The crystal structure of the title complex, [Cd(C(20)H(25)N(2)O(2))Cl], reveals a hydrogen-bonded dimer composed of neutral molecules. The Cd(II) center is five-coordinated by two O atoms of the pendant arms, two nitrogen donors of the 1, 5-diazacyclooctane ring and a chloride anion. The coordination geometry of the complex could be described as a distorted square pyramid. The 1,5-diazacyclooctane backbone adopts a boat/chair configuration and the two phenol/phenolato groups have a dihedral angle of 101.3 (2) degrees between them. The coordinated phenolate and phenolic groups of inversion-related molecules form strong intermolecular O-H.O hydrogen bonds.
A novel three-dimensional copper(II) network via hydrogen bonds: diaquabis
The crystal structure of the title complex, [Cu(C(7)H(8)N(4))(2)(H(2)O)(2)](ClO(4))(2), consists of a discrete centrosymmetric [Cu(C(7)H(8)N(4))(2)(H(2)O)(2)](2+) cation and two perchlorate anions. The Cu(II) centre is six-coordinated by four N donors from the two pyrazole rings [Cu-N 1.998 (2) and 2.032 (3) A] and two O atoms from the water molecules occupying the apical sites [Cu-O 2.459 (3) A]. The coordination geometry of the complex can be described as octahedral. There is a unique three-dimensional network in which the perchlorate units are linked by a combination of strong O-H.O and weak C-H.O hydrogen bonds.