Synthesis and characterisation of infinite co-ordination networks from flexible dipyridyl ligands and cadmium salts †

Publisher Website
Google Scholar
Abstract
Crystallisation of flexible dipyridyl ligands with Cd(NO3)2·6H2O or CdSO4·6H2O gives co-ordination networks of composition [Cd(NO3)2(Py2CH2)2] 1 [Py2CH2 = 1,1-bis(4-pyridyl)methane]; [Cd2(NO3)4(Py2C3H6)4(H2O)] 2 [Py2C3H6 = 1,3-bis(4-pyridyl)propane]; [Cd2(SO4)2(Py2C3H6)3(H2O)2.7]·4.5H2O 3; [Cd(NO3)2(Py2C4H8)(H2O)2] 4 [Py2C4H8 = 1,4-bis(4-pyridyl)butane]; [Cd2(NO3)4(Py2C5H10)3(H2O)] 5 [Py2C5H10 = 1,5-bis(4-pyridyl)pentane] and [Cd(NO3)2(Py2C6H12)2] 6 [Py2C6H12 = 1,6-bis(4-pyridyl)hexane]. The compounds were characterised by X-ray single crystal diffraction studies. In compounds 1, 2, 4 and 6 the cadmium ions are hexa-co-ordinate with a slightly distorted octahedral geometry. Compounds 3 and 5 both display examples of a less common hepta-co-ordinate cadmium ion geometry. Compounds 2, 3 and 6 exhibit novel modes of interpenetration.