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Metallkomplexe mit biologisch wichtigen Liganden, LXVIII. Metallorganische Asparaginato‐Cobaltkomplexe als Liganden für Alkali‐Ionen
Author(s) -
Bergs Ralph,
Sünkel Karlheinz,
Beck Wolfgang
Publication year - 1993
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19931261114
Subject(s) - chemistry , alkali metal , carboxylate , adduct , crystal structure , medicinal chemistry , stereochemistry , potassium , cobalt , inorganic chemistry , crystallography , organic chemistry
Metal Complexes of Biologically Important Ligands, LXVIII [1] . – Organometallic Asparaginato Cobalt Complexes as Ligands for Alkaline Ions The trischelate complexes of the dianion of aspartic acid and β‐methylaspartic acid (η 5 ‐C 5 Me 5 )] (R = H, Me) form adducts with alkali iodides MI (M = Li, Na, K). The polymeric structure of (η 5 ‐C 5 Me 5 )Co( L ‐asp.–2H + )KI ( 1c ) was determined by X‐ray diffraction. In the crystal of 1c the potassium ions are surrounded by five oxygen atoms of the carboxylate groups whereby two oxygen atoms form bridges between two K + ions. Similarly, trischelate complexes 4 and 5 have been obtained from (η 5 ‐C 5 Me 5 )Co(CO)I 2 and 2,3‐diaminopropionic, 2,4‐diaminobutyric acid, and asparagine, respectively.