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Two different anionic manganese(II) coordination polymers constructed through dicyanamide coordination bridges
Author(s) -
Wang HuiTing
Publication year - 2015
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/s2053229615015818
Subject(s) - dicyanamide , manganese , polymer , chemistry , coordination polymer , coordination complex , polymer chemistry , materials science , metal , organic chemistry , catalysis , ionic liquid
In order to explore new metal coordination polymers and to search for new types of ferroelectrics among hybrid coordination polymers, two manganese dicyanamide complexes, poly[tetramethylammonium [di‐μ 3 ‐dicyanamido‐κ 6 N 1 : N 3 : N 5 ‐tri‐μ 2 ‐dicyanamido‐κ 6 N 1 : N 5 ‐dimanganese(II)]], {[(CH 3 ) 4 N][Mn 2 (NCNCN) 5 ]} n , (I), and catena ‐poly[bis(butyltriphenylphosphonium) [[(dicyanamido‐κ N 1 )manganese(II)]‐di‐μ 2 ‐dicyanamido‐κ 4 N 1 : N 5 ]], {[(C 4 H 9 )(C 6 H 5 ) 3 P] 2 [Mn(NCNCN) 4 ]} n , (II), were synthesized in aqueous solution. In (I), one Mn II cation is octahedrally coordinated by six nitrile N atoms from six anionic dicyanamide (dca) ligands, while the second Mn II cation is coordinated by four nitrile N atoms and two amide N atoms from six anionic dca ligands. Neighbouring Mn II cations are linked together by μ‐1,5‐ and μ‐1,3,5‐bridging dca anions to form a three‐dimensional polymeric structure. The anionic framework exhibits a solvent‐accessible void of 289.8 Å 3 , amounting to 28.0% of the total unit‐cell volume. Each of the cavities in the network is occupied by only one tetramethylammonium cation. In (II), each Mn II cation is octahedrally coordinated by six nitrile N atoms from six dca ligands. Neighbouring Mn II cations are linked together by double dca bridges to form a one‐dimensional polymeric chain, and C—H...N hydrogen‐bonding interactions are involved in the formation of the one‐dimensional layer structure.