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The Tetracyanopyrrolide Anion as Ligand in Transition Metal Complexes
Author(s) -
Szafranowska Barbara,
Beck Johannes
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400199
Subject(s) - acetonitrile , chemistry , ligand (biochemistry) , paramagnetism , medicinal chemistry , ion , ring (chemistry) , transition metal , metal , crystallography , atom (system on chip) , inorganic chemistry , organic chemistry , embedded system , catalysis , biochemistry , physics , receptor , computer science , quantum mechanics
Two isotypic mononuclear discrete complexes [Co(MeCN) 4 (tcp) 2 ] · 2MeCN ( 1 ) and [Ni(MeCN) 4 (tcp) 2 ] · 2MeCN ( 2 ) containing the tetracyanopyrrolide anion [C 4 (CN) 4 N] – (tcp) were synthesized from [Me 4 N]tcp and the respective metal perchlorates in acetone/acetonitrile. Tcp coordinates to the transition metal atoms in η 1 fashion via the nitrogen atom of the pyrrole ring. No coordination via the cyano groups is observed. Both complexes show nearly ideal paramagnetic behavior according to the Curie law with magnetic moments of 4.98 μ B for 1 and 3.09 μ B for 2 . In the presence of Cu 2+ ions tcp reacts with traces of water under hydrolysis of one cyano group to tricyanopyrrole‐2‐carboxamide (NC 4 (CN) 3 C(O)NH 2 ) – (tcpc). From solutions in DMF the complex [Cu(tcpc) 2 (DMF) 2 ] ( 3 ) is isolated.