Cobalt(II) coordination polymers versus discrete complex with 4, 2′:6′, 4″-terpyridine ligands: The role of a pyrenyl substituent. (24th November 2015)

• Record Type: Journal Article
• Authors: Yin, Zhiwei; Zhang, Shengguo; Zheng, Shengping; Golen, James A.; Rheingold, Arnold L.; Zhang, Guoqi
• Is Part Of: Polyhedron. Volume 101(2015)
• Page Start: 139
• Page End: 145
• Publication Date: 2015-11-24
• Subjects: 4, 2′:6′, 4″-Terpyridine -- Coordination polymer -- Discrete complex -- Cobalt(II) thiocyanate -- Crystal structure; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2015.09.008
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Three divergent 4, 2′:6′, 4″-terpyridine ligands containing different substituents in the 4′-position were employed to assemble metal–organic architectures with Co(NCS)2 . While using small substituents for the self-assembly gives 2D or 3D metal–organic networks as usual, a bulky pyrenyl group is responsible for the formation of the first discrete mononuclear cobalt(II) complex with this type of ligands. Abstract: A new pyrene-containing 4, 2′:6′, 4″-terpyridine (4, 2′:6′, 4″-tpy) ligand (L3) is synthesized. The Co(NCS)2 -mediated self-assembly of this ligand along with two known analogues (L1 and L2) was investigated. The reactions of L1 or L2 containing only small aromatic substituents in the 4′-position of 4, 2′:6′, 4″-tpy with Co(NCS)2 by a layering crystallization procedure give rise to single crystals suitable for X-ray structural analysis and 3-D or 2-D coordination polymers were revealed in their crystals, respectively. Interestingly, going from L1 and L2 to L3 by introducing a relatively bulky 4′-substituent in the ligand results in the observation of the first discrete complex of cobalt(II) with 4, 2′:6′, 4″-tpy ligands under the same synthetic conditions.