Journal
DALTON TRANSACTIONS
Volume 49, Issue 21, Pages 7084-7092Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt00917b
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Funding
- Russian Science Foundation [17-13-01442]
- Grants Council of the President of the Russian Federation [MK-415.2019.3]
- Algerian DG-RSDT (Direction Generale de la Recherche Scientifique et du Developpement Technologique)
- Universite Ferhat Abbas Setif 1
- Russian Science Foundation [17-13-01442] Funding Source: Russian Science Foundation
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In crystal structures of two chain coordination polymers [M(tcnopr3OH)(2)(H2O)(2)] (M = Ni-II and Co-II; tcnopr3OH(-) = [(NC)(2)CC(O(CH2)(3)OH)C(CN)(2)](-)) based on a N,O or N,N'-bridge polynitrile ligand, the parallel chains are connected via, respectively, C N center dot center dot center dot H-O and O-H center dot center dot center dot O hydrogen bonds between uncoordinated functional groups of the ligand and coordinated water molecules. Upon heating, both solids undergo dehydration accompanied by degradation of their single crystals. Powder X-ray diffraction showed that non-isostructural triclinic single crystals transformed to isostructural monoclinic compounds. The solid-state reaction yielded 3D coordination polymers [M(tcnopr3OH)(2)] (M = Ni-II and Co-II) based on a N,N',O-connected tcnopr3OH(-). Although previously tens of complexes based on tcnopr3OH and similar anions were synthesized and X-ray characterized, none of these contain a tridentate polynitrile ligand. Thus, this study provides evidence that solid-state reactions allow obtaining novel coordination modes of polynitrile ligands. The possible pathways for the transformation of H-bonded networks to 3D coordination polymers are discussed on the basis of the topological approach. Applicability of the topological approach to predict possible networks of solid-state reaction products based on the crystal structures of initial compounds is demonstrated.
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