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2,2′-Bipyridine or 1,10-phenanthroline chelated oxomolybdenum(V) complexes with glycolate, lactate and malate in acidic media
- Source :
- Inorganica Chimica Acta. 490:173-178
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- A series of dimeric oxomolybdenum(V) 2,2′-bipyridine or 1,10-phenanthroline α-hydroxycarboxylates trans-[(MoO)2O(glyc)2(bpy)2]·3H2O (1), trans-[(MoO)2O(lact)2(bpy)2]·3H2O (2), trans-[(MoO)2O(Hmal)2(bpy)2] (3), trans-[(MoO)2O(lact)2(phen)2]·4H2O (4) and trans-[(MoO)2O(Hmal)2(phen)2]·4H2O (5) have been synthesized in acidic media for comparisons, where glycolate, lactate and malate in 1–5 chelate to molybdenum(V) with bidentate α-alkoxy and α-carboxy groups respectively. Unlike the molybdenum(IV) lactate in low valence [1] , no protonation was observed for α-alkoxy groups even under acidic condition. The two molybdenum atoms in 1 and 3 are paramagnetic independently as examples by EPR spectroscopies. Solid state 13C NMR spectra of 1 and 3 show large downfield shifts for the coordinated glycolate and malate (δα-alkoxy 75.4, 82.8 ppm, Δδ 13.4 ppm). Moreover, a monomeric mixed ligand oxomolybdenum(VI) complex MoO2(glyc)(bpy) (6) was isolated.
- Subjects :
- Denticity
010405 organic chemistry
Chemistry
Phenanthroline
chemistry.chemical_element
Protonation
Carbon-13 NMR
010402 general chemistry
01 natural sciences
Medicinal chemistry
2,2'-Bipyridine
0104 chemical sciences
law.invention
Inorganic Chemistry
chemistry.chemical_compound
law
Molybdenum
Materials Chemistry
Chelation
Physical and Theoretical Chemistry
Electron paramagnetic resonance
Subjects
Details
- ISSN :
- 00201693
- Volume :
- 490
- Database :
- OpenAIRE
- Journal :
- Inorganica Chimica Acta
- Accession number :
- edsair.doi...........250999e2a78b19440285a03d8d180743