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The First Structurally Characterized Trinuclear Dipicolinato Manganese Complex and its Conversion into a Mononuclear Species by Ligand Substitution
Author(s) -
Ma Chengbing,
Chen Changneng,
Liu Qiutian,
Liao Daizheng,
Li Licun
Publication year - 2003
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.200390159
Subject(s) - chemistry , ligand (biochemistry) , manganese , dipicolinic acid , picolinic acid , pentagonal bipyramidal molecular geometry , crystallography , imidazole , substitution reaction , stereochemistry , substitution (logic) , medicinal chemistry , crystal structure , organic chemistry , receptor , biochemistry , botany , spore , computer science , programming language , biology
The novel complex [Mn 3 (pdc) 3 (bpy) 3 (H 2 O) 2 ] ( 1 ) (H 2 pdc = 2,6‐pyridinedicarboxylic acid, also known as 2,6‐dipicolinic acid; bpy = 2,2′‐bipyridine), has been obtained from the reaction of polymeric [MnK 2 (pdc) 2 (H 2 O) 7 ] n ( 2 ) with bpy, and is the first example of a structurally characterized, trinuclear Mn complex incorporating dipicolinato ligands. All the Mn II centers are seven‐coordinate in severely distorted pentagonal‐bipyramidal geometries. The conversion of 1 to mononuclear [Mn(pdc)(bpy)(Him) 2 ] ( 3 ) (Him = imidazole), which is the first seven‐coordinate Mn complex with a Him ligand, has also been achieved by substitution of the labile ligand in 1 by Him. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)