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Redox Reactions Between Guanidine Electron Donors and Silver Dicyanamide: Synthesis of C,N Material Precursors and Coordination Polymers
Author(s) -
Eberle Benjamin,
Herrmann Hendrik,
Kaifer Elisabeth,
Himmel HansJörg
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201300267
Subject(s) - dicyanamide , chemistry , cationic polymerization , guanidine , redox , benzene , polymer , polymer chemistry , coordination polymer , medicinal chemistry , inorganic chemistry , organic chemistry , catalysis , ionic liquid
Abstract Reaction of the organic electron donors ttmgb [1,2,4,5‐tetrakis(tetramethylguanidinyl)benzene] and tdmegb [1,2,4,5‐tetrakis( N , N ′‐dimethylethyleneguanidinyl)benzene] with two equivalents of silver dicyanamide, Ag(dca), yielded the two salts (ttmgb)(dca) 2 ( 1a ) and (tdmegb)(dca) 2 ( 1b ). Their relatively high N/C ratios motivated an analysis of their suitability as precursors to C,N materials. The compounds melt at around 200 °C and decompose at 220 ( 1a ) and 245 °C ( 1b ). Reactions of the organic electron donors with an excess of Ag(dca) resulted in coupled redox and coordination reactions, leading finally to coordination polymers with different dimensionalities. The oxidized guanidine units in the polymers are connected through Ag–dca–Ag bridges, leading to stacks of co‐planar C 6 rings. The resulting cationic networks are neutralized by dca anions or anionic Ag(dca) chains.