文摘
A new series ZnII metal鈥搊rganic compounds [both coordination complexes (CCs) and coordination polymers (CPs)] derived from bis-pyridyl ligands equipped with hydrogen-bonding functionality such as urea have been synthesized and characterized by single crystal X-ray crystallography. Out of the six compounds reported herein, [{Zn(渭-3bpmu)Cl2}] (CP1), [{Zn(渭-3bpmu)Cl2}路benzene] (CP2), [{Zn(渭-3bpmu)Cl2}路p-xylene] (CP3), and [{Zn(渭-4bpmu)Cl2}路p-xylene] (CP4) are coordination polymers, whereas [{Zn2(渭-3bpu)2Cl4}路p-xylene] (CC1) and [{Zn2(渭-3bpu)2Cl4}路benzene] (CC2) are coordination complexes. The solvent of crystallization has profound effect on the supramolecular architecture of the resultant coordination compounds; while crystallization in the presence of aromatic solvents resulted in guest occluded crystals (CP2鈥?b>CP4, CC1, and CC2), crystallization using only polar solvents produced crystals devoid of guests. Aromatic solvents appear to have induced the formation of metallamacrocycle in CC1 and CC2.