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Andrzej Wlodarczyk - One of the best experts on this subject based on the ideXlab platform.
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redox activity of bimetallic complexes based on tris 3 5 dimethylpyrazolyl borato molybdenum ii and tungsten ii nitrosyls complexes derived from ethane 1 2 diol and the crystal structure of anti mo no hb 3 5 me2c3hn2 3 och2ch2o 2 4chcl3
Polyhedron, 2007Co-Authors: Piotr P Romanczyk, Matylda N Guzik, Andrzej WlodarczykAbstract:Abstract The bimetallic complexes [{M(NO)(TpMe2)X}2(OCH2CH2O)] [TpMe2 = HB(3,5-Me2C3HN2)3; M = Mo, X = Cl, Br or I; M = W, X = Cl] have been synthesised and characterised spectroscopically and electrochemically. These species can occur as mixture of two diastereoisomers and one of them could be separated following a thermal treatment of the mixture. A direct synthesis of single diastereoisomers (M = Mo, X = I; M = W, X = Cl) is also described. The bimetallic species exhibit two one-electron reduction processes separated by a modest potential difference, ΔE1/2, ca. 300 mV (M = Mo, X = Cl, Br) indicating an intermediate metal–metal interaction. In the crystal structure of anti-[{Mo(NO)(TpMe2)(OCH2CH2O)}2] · 4CHCl3 two nonequivalent dinuclear molecules (Point Group C2h) are found, with crystallographically identical, doubly bridged {Mo(NO)(TpMe2)} distorted octahedral units.
Piotr P Romanczyk - One of the best experts on this subject based on the ideXlab platform.
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redox activity of bimetallic complexes based on tris 3 5 dimethylpyrazolyl borato molybdenum ii and tungsten ii nitrosyls complexes derived from ethane 1 2 diol and the crystal structure of anti mo no hb 3 5 me2c3hn2 3 och2ch2o 2 4chcl3
Polyhedron, 2007Co-Authors: Piotr P Romanczyk, Matylda N Guzik, Andrzej WlodarczykAbstract:Abstract The bimetallic complexes [{M(NO)(TpMe2)X}2(OCH2CH2O)] [TpMe2 = HB(3,5-Me2C3HN2)3; M = Mo, X = Cl, Br or I; M = W, X = Cl] have been synthesised and characterised spectroscopically and electrochemically. These species can occur as mixture of two diastereoisomers and one of them could be separated following a thermal treatment of the mixture. A direct synthesis of single diastereoisomers (M = Mo, X = I; M = W, X = Cl) is also described. The bimetallic species exhibit two one-electron reduction processes separated by a modest potential difference, ΔE1/2, ca. 300 mV (M = Mo, X = Cl, Br) indicating an intermediate metal–metal interaction. In the crystal structure of anti-[{Mo(NO)(TpMe2)(OCH2CH2O)}2] · 4CHCl3 two nonequivalent dinuclear molecules (Point Group C2h) are found, with crystallographically identical, doubly bridged {Mo(NO)(TpMe2)} distorted octahedral units.
Matylda N Guzik - One of the best experts on this subject based on the ideXlab platform.
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redox activity of bimetallic complexes based on tris 3 5 dimethylpyrazolyl borato molybdenum ii and tungsten ii nitrosyls complexes derived from ethane 1 2 diol and the crystal structure of anti mo no hb 3 5 me2c3hn2 3 och2ch2o 2 4chcl3
Polyhedron, 2007Co-Authors: Piotr P Romanczyk, Matylda N Guzik, Andrzej WlodarczykAbstract:Abstract The bimetallic complexes [{M(NO)(TpMe2)X}2(OCH2CH2O)] [TpMe2 = HB(3,5-Me2C3HN2)3; M = Mo, X = Cl, Br or I; M = W, X = Cl] have been synthesised and characterised spectroscopically and electrochemically. These species can occur as mixture of two diastereoisomers and one of them could be separated following a thermal treatment of the mixture. A direct synthesis of single diastereoisomers (M = Mo, X = I; M = W, X = Cl) is also described. The bimetallic species exhibit two one-electron reduction processes separated by a modest potential difference, ΔE1/2, ca. 300 mV (M = Mo, X = Cl, Br) indicating an intermediate metal–metal interaction. In the crystal structure of anti-[{Mo(NO)(TpMe2)(OCH2CH2O)}2] · 4CHCl3 two nonequivalent dinuclear molecules (Point Group C2h) are found, with crystallographically identical, doubly bridged {Mo(NO)(TpMe2)} distorted octahedral units.
Wolfgang Brockner - One of the best experts on this subject based on the ideXlab platform.
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preparation crystal structure vibrational spectra and thermal behavior of rb2h2p2o6 2h2o
Zeitschrift für anorganische und allgemeine Chemie, 2014Co-Authors: Mimoza Gjikaj, Wolfgang BrocknerAbstract:Single crystals of Rb2H2P2O6·2H2O could be obtained from aqueous solutions of hypodiphosphoric acid and rubidium carbonate. Its crystal structure was determined by X-ray diffraction and it crystallizes in the monoclinic space Group P21/c with Z = 4. The salt-like title compound consists of [H2P2O6]2– units in staggered P2O6-skeleton conformation, Rb+ cations, and H2O molecules, held together by intermolecular hydrogen bonds of the type O···O. The vibrational spectra (IR/FIR and Raman) of the rubidium salt were recorded and an assignment of the vibrational modes is proposed based on the Point Group C2h for the P2O6-skeleton of the anion. The thermal behavior of Rb2H2P2O6·2H2O is dominated by a complex TG decay indicating a simultaneous H2O delivery coupled with a disproportionation of [H2P2O6]2–, what is also supported by Raman spectra of heated samples.
Mimoza Gjikaj - One of the best experts on this subject based on the ideXlab platform.
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preparation crystal structure vibrational spectra and thermal behavior of rb2h2p2o6 2h2o
Zeitschrift für anorganische und allgemeine Chemie, 2014Co-Authors: Mimoza Gjikaj, Wolfgang BrocknerAbstract:Single crystals of Rb2H2P2O6·2H2O could be obtained from aqueous solutions of hypodiphosphoric acid and rubidium carbonate. Its crystal structure was determined by X-ray diffraction and it crystallizes in the monoclinic space Group P21/c with Z = 4. The salt-like title compound consists of [H2P2O6]2– units in staggered P2O6-skeleton conformation, Rb+ cations, and H2O molecules, held together by intermolecular hydrogen bonds of the type O···O. The vibrational spectra (IR/FIR and Raman) of the rubidium salt were recorded and an assignment of the vibrational modes is proposed based on the Point Group C2h for the P2O6-skeleton of the anion. The thermal behavior of Rb2H2P2O6·2H2O is dominated by a complex TG decay indicating a simultaneous H2O delivery coupled with a disproportionation of [H2P2O6]2–, what is also supported by Raman spectra of heated samples.