Premium
Carbamates of Polyamines – Versatile Building Blocks for the Construction of Polynuclear Metal Complexes
Author(s) -
Neis Christian,
Weyhermüller Thomas,
Bill Eckhard,
Stucky Stefan,
Hegetschweiler Kaspar
Publication year - 2008
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.200701320
Subject(s) - chemistry , polyamine , chelation , metal , derivative (finance) , amine gas treating , combinatorial chemistry , stereochemistry , inorganic chemistry , organic chemistry , biochemistry , financial economics , economics
Abstract A new concept for the design of polynuclear metal complexes is described: Partial aeration of a polyamine solution with CO 2 generates a system where both, a chelating agent (the unreacted polyamine) and a bridging agent (the polycarbamate) are present. Together with a metal cation, these components constitute an ideal set of building blocks for the construction of extended molecular architectures. These considerations are exemplified in the reaction of the well‐known triamine 6‐methyl‐1,4‐diazepan‐6‐amine (L) with Fe II under aerobic conditions. After partial conversion of L into its dicarbamate derivative H –2 L(CO 2 ) 2 2– , the components spontaneously assemble to the tetranuclear complex [(μ‐O) 2 (Fe III L) 4 {μ‐H –2 L(CO 2 ) 2 } 2 ] 4+ ( 1 4+ ). 1 (ClO 4 ) 4 was characterized by single‐crystal X‐ray analysis, Mössbauer spectroscopy, and magnetic susceptibility measurements.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)