Synthesis, solution and crystal structures of dinuclear vanadium(V) oxo monoperoxo complexes with mandelic acid: (NR4)2[V2O2(O2)2(mand)2] . xH2O [R=H, Me, Et; MAND=mandelato(2-)=C8H6O3 2-]

AHMED, M., P. SCHWENDT, Jaromír MAREK and M. SIVÁK. Synthesis, solution and crystal structures of dinuclear vanadium(V) oxo monoperoxo complexes with mandelic acid: (NR4)2[V2O2(O2)2(mand)2] . xH2O [R=H, Me, Et; MAND=mandelato(2-)=C8H6O3 2-]. Polyhedron. Velká Británie: PERGAMON-ELSEVIER SCIENCE LTD, OXFORD, 2004, vol. 23, No 4, p. 655-663. ISSN 0277-5387.

Basic information

• Original name: Synthesis, solution and crystal structures of dinuclear vanadium(V) oxo monoperoxo complexes with mandelic acid: (NR4)2[V2O2(O2)2(mand)2] . xH2O [R=H, Me, Et; MAND=mandelato(2-)=C8H6O3 2-]
• Name in Czech: Syntéza, roztok a krystal. struktura 2jaderného oxo-peroxovanadičnatého komplexu s kyselinou mandelátovou: (NR4)2[V2O2(O2)2(mand)2] . xH2O [R=H, Me, Et; MAND=mandelato(2-)=C8H6O3 2-].
• Authors: AHMED, M. (818 Egypt), P. SCHWENDT (703 Slovakia), Jaromír MAREK (203 Czech Republic, guarantor) and M. SIVÁK (703 Slovakia).
• Edition: Polyhedron, Velká Británie, PERGAMON-ELSEVIER SCIENCE LTD, OXFORD, 2004, 0277-5387.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10402 Inorganic and nuclear chemistry
• Country of publisher: United Kingdom of Great Britain and Northern Ireland
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 1.586
• RIV identification code: RIV/00216224:14310/04:00009932
• Organization unit: Faculty of Science
• UT WoS: 000189216400021
• Keywords in English: Crystal structure; IR spectra; 51V NMR spectra;Vanadium(V) peroxo mandelato complex
• Tags: 51V NMR spectra, Crystal Structure, IR spectra, Vanadium(V) peroxo mandelato complex

Abstract

Vanadium(V) oxo peroxo mandelato complexes were prepared from aqueous solution and characterized by elemental analysis, IR, UV-Vis and 51V NMR spectroscopies. The single crystal X-ray studies of (NMe4)2[V2O2 (O2)2(R,S-mand)2].6.5H2O (3), (NMe4)(NH4)[V2O2(O2)2(R,S-mand)2].2H2O (4) and (NEt4)2[V2O2(O2)2(R-mand)2] (8) revealed that the mandelato ligand behaves as a bidentate chelator adopting the (O-, COO-) donor set. The complex anions in structures of 3 and 8 contain a dinuclear V2O2 core with cyclic arrangement of two vanadium atoms and two hydroxyl oxygen atoms from the bridging mand ligands. Each vanadium atom is coordinated by six oxygen atoms arising from two hydroxyl and one carboxyl groups, 2-peroxo ligand and one end-bonded oxo ligand. The coordination polyhedron can be described as distorted pentagonal pyramid. The structure of 4 is unique as it contains in the unit cell differently coordinated water molecules in two types of dinuclear anions: [V2O2(O2)2(R-mand)2(H2O)]2-, with nearly symmetrically bonded bridging water molecule and pentagonal bipyramidal arrangement arround both vanadium atoms, and [V2O2(O2)2(S-mand)2(H2O)]2-, with the water molecule coordinated only to one vanadium atom. The vanadium atoms thus have different coordination geometries: pentagonal pyramidal and pentagonal bipyramidal, the latter exhibiting a better planarity of the fitted atoms of the pentagonal plane and a smaller deviation of the vanadium atom from this plane.

Abstract (in Czech)

2jaderný oxo-peroxovanadičnatý komplex s kyselinou mandelátovou byl připraven z vodného roztoku a charakterizován element. analýzou, IR, UV-Vis, 51V NMR a rtg. strukturní analýzou.

Links

• MSM 143100008, plan (intention): Name: Genomy a jejich funkce

Investor: Ministry of Education, Youth and Sports of the CR, Genomes and their functions