نتایج جستجو برای: molybdenum vi complexes

تعداد نتایج: 191792  

Journal: :Dalton transactions 2016
Niklas Zwettler Martina E Judmaier Lara Strohmeier Ferdinand Belaj Nadia C Mösch-Zanetti

Synthesis of molybdenum(vi) dioxido complexes 1-3, coordinated by one or two functionalized iminophenolate ligands HL1 or HL2, bearing a donor atom side chain or a phenyl substituent, respectively, allowed for systematic investigation of the oxygen atom transfer (OAT) reactivity of such complexes towards phosphanes. Depending on stoichiometry and employed phosphane (PMe3 or PPh3), different mol...

Journal: :Chemical communications 2001
A Cervilla F Pérez-Pla E Llopis

Tris(benzene-1,2-dithiolate)molybdenum(VI) reacts rapidly and quantitatively with tetrabutylammonium hydroxide to yield the corresponding Mo(V) and Mo(IV) complexes and hydrogen peroxide; the reaction has been executed in dry tetrahydrofuran where the reaction rate shows a fair dependence on complex and OH- concentrations.

2012
Raveendra Reddy V Krishna Reddy

Determination of molybdenum(VI) by direct spectrophotometry and simultaneous determination of molybdenum(VI) and titanium(IV) are reported. Molybdenum(VI) gives a golden yellow colour with 2,4dihydroxybenzaldehyde isonicotinoyl hydrazone with a 1:2 metal-reagent stoichiometry at pH 1.5. The complex shows an absorption maximum at 445 nm with molar absorptivity and Sandell's sensitivity of 1.02x1...

Journal: :Dalton transactions 2008
Patrícia M Reis Paulo Jorge Costa Carlos C Romão José A Fernandes Maria José Calhorda Beatriz Royo

The high-valent oxo-molybdenum(VI) and -rhenium(VII) and -(V) derivatives MoO2Cl2, ReCH3O3 (MTO) and ReIO2(PPh3)2 catalyze the selective hydrogenation of alkynes to alkenes at 80 degrees C under 40 atm of pressure. The reduction of sulfoxides to sulfides has also been performed by oxo-rhenium and -molybdenum complexes using hydrogen as a reducing agent. Activation of hydrogen by MoO2Cl2 and MoO...

Hossein Nahalparvary Mohammad Hossein Pournaghi-Azar,

The voltammetric characteristics of Mo (VI) oxinate at the mercury electrode, in the presence of tri-butylammonium perchlorate (tri-BAP) and piperidinium perchlorate (PP) + piperidine (P) as  two different types supporting electrolytes, have been studied in chloroform. With the both supporting electrolytes a two electron irreversible process for the reduction  of Mo (VI) oxinate was observe...

Journal: :Inorganic chemistry 2017
Sudarshana Majumder Sagarika Pasayat Alok K Panda Subhashree P Dash Satabdi Roy Ashis Biswas Mokshada E Varma Bimba N Joshi Eugenio Garribba Chahat Kausar Samir Kumar Patra Werner Kaminsky Aurélien Crochet Rupam Dinda

Four novel dimeric bis-μ-imido bridged metal-metal bonded oxidomolybdenum(V) complexes [MoV2O2L'21-4] (1-4) (where L'1-4 are rearranged ligands formed in situ from H2L1-4) and a new mononuclear dioxidomolybdenum(VI) complex [MoVIO2L5] (5) synthesized from salen type N2O2 ligands are reported. This rare series of imido-bridged complexes (1-4) have been furnished from rearranged H3L'1-4 ligands, ...

2013
A. Nolle P. Kroneck

Molybdenum has been widely used as a redoxactive catalyst both in chemical systems and the living cell1 . Its catalytic versatility seems mainly due to the fact that it can be more or less readily stabilized in several different oxidation states ranging from 0 to + VI. Mononuclear and diamagnetic complexes have been isolated in the oxidation states 0, + IV and + VI, whereas paramagnetic species...

K Saberian M Ghannadi Maraghe

Hydrofluoric acid has been used as a novel stripping agent for molybdenum (VI) after its extraction with Cyanex 301. In the extraction steps effects of parameters such as type and initial concentration of acid, type of diluent, extractant concentration, metal concentration and temperature have been studied. In thestripping step, the effects of various stripping agents on stripping efficiency ha...

2011
Xiangyang Lei Nagasree Chelamalla

In the title compound, [Mo(C(34)H(54)N(2)O(2))O(2)]·CHCl(3), the molybdenum(VI) ion exhibits a cis-dioxide distorted octa-hedral geometry. Two anionic phenolate O-atom donors and two neutral N-atom donors of the ligand are trans and cis, respectively. The Mo=O bond lengths and the O=Mo=O bond angle are typical for six-coordinated dioxomolyb-denum(VI) complexes. The Mo-N bond lengths are longer ...

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