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Structural investigation of one‐ and two‐dimensional coordination polymers based on cobalt–bis(dioxolene) units and 1‐hydroxy‐1,2,4,5‐tetrakis(pyridin‐4‐yl)cyclohexane
Author(s) -
Drath Olga,
Gable Robert W.,
Boskovic Colette
Publication year - 2018
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s205322961800671x
Subject(s) - cyclohexane , cobalt , valence (chemistry) , chemistry , tautomer , medicinal chemistry , coordination polymer , crystallography , stereochemistry , crystal structure , inorganic chemistry , organic chemistry
The combination of cobalt, 3,5‐di‐ tert ‐butyldioxolene (3,5‐dbdiox) and 1‐hydroxy‐1,2,4,5‐tetrakis(pyridin‐4‐yl)cyclohexane (tpch) yields two coordination polymers with different connectivities, i.e. a one‐dimensional zigzag chain and a two‐dimensional sheet. Poly[[bis(3,5‐di‐ tert ‐butylbenzene‐1,2‐diolato)bis(1,5‐di‐ tert ‐butyl‐4‐oxocyclohexa‐2,5‐dien‐1‐yl‐3‐olato)[μ 4 ‐1‐hydroxy‐1,2,4,5‐tetrakis(pyridin‐4‐yl)cyclohexane]cobalt(III)]–ethanol–water 1/7/5], {[Co 2 (C 14 H 20 O 2 ) 4 (C 26 H 24 N 4 O)]·7C 2 H 5 OH·5H 2 O} n or {[Co 2 (3,5‐dbdiox) 4 (tpch)}·7EtOH·5H 2 O} n , is the second structurally characterized example of a two‐dimensional coordination polymer based on linked {Co(3,5‐dbdiox) 2 } units. Variable‐temperature single‐crystal X‐ray diffraction studies suggest that catena ‐poly[[[(3,5‐di‐ tert ‐butylbenzene‐1,2‐diolato)(1,5‐di‐ tert ‐butyl‐4‐oxocyclohexa‐2,5‐dien‐1‐yl‐3‐olato)cobalt(III)]‐μ‐1‐hydroxy‐1,2,4,5‐tetrakis(pyridin‐4‐yl)cyclohexane]–ethanol–water (1/1/5)], {[Co(C 14 H 20 O 2 ) 2 (C 26 H 24 N 4 O)]·C 2 H 5 OH·5H 2 O} n or {[Co(3,5‐dbdiox) 2 (tpch)]·EtOH·5H 2 O} n , undergoes a temperature‐induced valence tautomeric interconversion.