From pink to blue and back to pink again: changing the Co( ii ) ligation in a two-dimensional coordination network upon desolvation

Chisca, Diana; Croitor, Lilia; Coropceanu, Eduard B.; Petuhov, Oleg; Baca, Svetlana G.; Krämer, Karl; Liu, Shi-Xia; Decurtins, Silvio; Rivera-Jacquez, Hector J.; Masunov, Artëm E.; Fonari, Marina S. (2016). From pink to blue and back to pink again: changing the Co( ii ) ligation in a two-dimensional coordination network upon desolvation. CrystEngComm, 18(3), pp. 384-389. Royal Society of Chemistry 10.1039/c5ce01581b

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Heating of a pink two-dimensional Co(II) coordination network {[Co2(μ2-OH2)(bdc)2(S-nia)2(H2O)(dmf)]·2(dmf)·(H2O)}n (1) built from 1,4-benzenedicarboxylic acid (H2bdc) residues and thionicotinamide (S-nia) ligands initiates a single-crystal-to-single-crystal transition accompanied by removal of both coordinated and co-crystallized solvents. In the dry blue form, [Co(bdc)(S-nia)]n (dry_1), the Co(II) centers changed from an octahedral to a square pyramidal configuration.

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