Syntheses, 95Mo NMR Spectroscopy and Structures of Distorted Cubic Mo4(μ3-O)4(μ2-O2P(CH2C6H5)2)4O4 and the Open Mixed-Valent Cluster, Mo4(μ3-O)2(μ2-O2P(CH2C6H5)2)6O6

High‐field95Mo and183W static and MAS NMR study of polyoxometalates

“…The two other resonances showed close NMR parameters and thus difficult to assign, despite the fact that compounds with the Mo V ─Mo V bond giving rise to a diamagnetism generally provide high‐field signals (Fig. ) . The unpaired electrons in each centre of the dimeric units {Mo 2 } are supposed to be coupled and localized, and paramagnetism if any should be very weak.…”

“…Typical chemical shifts range for 95 Mo NMR of Mo VI in octahedral and pentavalent environments and Mo V in octahedral geometry with oxygen‐donor ligands according to literature . POM, polyoxometalate.…”

Molybdenum imidazole citrate and bipyridine homocitrate in different oxidation states – balance between coordinated α-hydroxy and α-alkoxy groups

“…Until now, a number of citrate or imidazole molybdenum complexes have been reported, while there is less interest on the mixed-ligand complexes of citrate and imidazole. 45,47,[56][57][58][59] Most of the mixed-valence molybdenum complexes focus on Mo(VI)/ Mo(V) and Mo(V)/Mo(IV), [47][48][49][50][51][52][53][54] fewer examples of Mo(VI)/Mo(IV) have been reported. 55 2were obtained from an aqueous solution.…”

“…44 The latter also contains octanuclear molybdenum complexes [Mo 8 O 26 (im) 2 ] 4À with imidazole from histidine residue as polyoxometalates. [44][45][46] It is noted that most of the mixed-valence molybdenum complexes are in VI/V and V/IV, [47][48][49][50][51][52][53][54] while molybdenum(VI/IV) complex is less common. 55…”

Syntheses and Structures of Three Complexes of Formulas [L3Co(μ2-O2P(Bn)2)3CoL′][L″], Featuring Octahedral and Tetrahedral Cobalt(II) Geometries; Variable-Temperature Magnetic Susceptibility Measurement and Analysis on [(py)3Co(μ2-O2PBn2)3Co(py)][ClO4]

“…Our interest in the complexes reported herein stems from our discovery that the dibenzylphosphinate ligand stabilizes tetrameric clusters such as [V 4 O 8 ] 4+ , [Mo 4 O 8 ] 4+ , and [W 4 O 8 ] 4+ . − Previous research reacting phosphinate ligands and cobalt have resulted in polymeric species. − In an extension of this work to prepare clusters of cobalt(III) oxides or hydroxides, we find that this ligand affords dinuclear clusters of the form [L 3 Co(μ 2 -O 2 P(CH 2 C 6 H 5 ) 2 ) 3 CoL′][L″]. Dark-blue crystals of [(py) 3 Co(μ 2 -O 2 PBn 2 ) 3 Co(py)][ClO 4 ] ( 1 ) were isolated first from an ethanol solution consisting of a mixture of Bn 2 PO 2 K, Co(ClO 4 ) 2 ·6H 2 O, pyridine (py), and H 2 O 2 .…”