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Zinc(II) carboxylates with imidazole and 2-methylimidazole: unprecedented cyclic dimer and polynuclear coordination polymers based on bridging phthalate ions by Svetlana G Baca; Irina G Filippova; Nicolae V Gerbeleu; Yurii A Simonov; Maria Gdaniec; Grigore A Timco; Olesea A Gherco; Yurii L Malaestean is a Chemistry article available to read on EtoBox.

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Novel zinc(II) coordination polymer [Zn(Pht)(Im) 2 ] n (1), unique cyclic dimer [Zn(Pht)(Im)(H 2 O)] 2 (2) and coordination polymer [Zn(Pht)(2-MeIm)] n (3) (where Pht 2( 0/dianion of o -phthalic acid, Im 0/imidazole, 2-MeIm 0/2-methylimidazole) have been synthesized and their structures characterized by X-ray crystallography. Both carboxylate groups of the phthalate dianion coordinate in a monodentate mode bridging two Zn(II) ions with formation of 1D zigzag chain in 1. Two Im ligands play a double role: they coordinate the metal atom and join the coordination polymers via N Ã/HÁ Á ÁO hydrogen bonds into a 3D-network. Complex 2 represents the first example of a metallocycle in which two Zn(II) atoms are bridged by two phthalate ligands forming a 14-membered ring. The Zn(II) atom is coordinated by two O atoms of Pht 2( carboxylate groups, N atom of the Im and O atom of the water molecule with formation of tetrahedral NO 3 metal-binding site. The molecules of 2 form a 3D-network through N Ã/HÁ Á ÁO and O Ã/HÁ Á ÁO hydrogen bonds between carboxylate groups of Pht 2( , Im and water molecules. Compound 3 reveals the characteristic structural features of both compounds 1 and 2. One pair

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Author

Svetlana G Baca; Irina G Filippova; Nicolae V Gerbeleu; Yurii A Simonov; Maria Gdaniec; Grigore A Timco; Olesea A Gherco; Yurii L Malaestean

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0020-1693)

Published

2003

Language

EN

Field

Chemistry (Physical Sciences)