Designed synthesis of Co( ii ) coordination polymers for evaluation of structural transformations

• Published in: CrystEngComm Vol. 26; no. 36; pp. 5099 - 5107
• Main Authors: Lee, Chia-Yi, Usman, Muhammad, Wang, Song-Wei, Thapa, Kedar Bahadur, Chen, Tsun-Ren, Chen, Jhy-Der
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 18.09.2024
• Subjects: Chemical synthesis; Coordination polymers; Crystallography; Single crystals; Topology; Water chemistry
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/D4CE00723A

Five coordination polymers constructed from Co( ii ) salts, N , N ′-bis(3-pyridylmethyl)oxalamide ( L ) and 4,4′-methylenedibenzoic acid (H 2 MBA), {[Co( L )(MBA)(H 2 O)]·H 2 O} n , 1, {[Co( L )(MBA)]·4H 2 O} n , 2, {[Co( L )(MBA)]·0.25H 2 O} n , 3, [Co( L )(MBA)(H 2 O) 2 ] n , 4, and {[Co( L ) 0.5 (MBA)(H 2 O) 2 ]·CH 3 OH} n , 5, are reported, which have been structurally characterized by using single crystal X-ray crystallography. Complexes 1 and 4 have the same formula, but differ in the number of coordinated and cocrystallized water molecules, whereas 2 and 3 form a pair of supramolecular isomers with different numbers of cocrystallized water molecules. Complexes 1 and 4 show interdigitated 2D layers with a (6 4 ·8·10)(6)-2,4L3 topology, which differ in the ligand conformations of L and bonding modes of MBA 2− . Complex 2 shows 2-fold interpenetrated 2D layers with a (6 4 ·8·10)(6)-2,4L3 topology and 3 displays a 2-fold interpenetrated 3D framework with a (4·6 2 )(4·6 6 ·8 3 )- fet topology, whereas 5 is a 1D ladder with a (6 2 ·10)(6)-2,3C1 topology, indicating that the coordination and/or cocrystallization of solvent molecules are important in determining their structural diversity. The structural transformations of 1–4 are also evaluated.