Alfonso V Venzo - Academia.edu (original) (raw)
Papers by Alfonso V Venzo
Organometallics, 2002
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Natural Product Research, 2006
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Journal of the Chemical Society, Chemical Communications, 1986
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Designed Monomers and Polymers, 2007
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Journal of Organometallic Chemistry, Sep 27, 1983
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Tetrahedron Letters, 1988
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Journal of the Chemical Society Chemical Communications, 1985
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Journal of Organometallic Chemistry, Oct 23, 1984
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Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1981
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Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1980
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Journal of the Chemical Society, Perkin Transactions 2, 1978
... spectroscopic observation of the com-plexed radical anion was not possible for acetophenone-t... more ... spectroscopic observation of the com-plexed radical anion was not possible for acetophenone-tricarbonylchromium in acetonit rile, tet rahydrof uran, and dimethyl ... The solution was allowed to react with excess of lithium following the procedure of Pearce.12 The crude bis-(3,5-t ...
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Transition Metal Chemistry, 1975
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Tetrahedron Letters, 1988
... pic THE FACILE REARRANGEMENT OF 1PHENYLINDENE TO 3PHENYL1NDENE INDUCED BY (CH3CN)3Cr(CO)3 Pie... more ... pic THE FACILE REARRANGEMENT OF 1PHENYLINDENE TO 3PHENYL1NDENE INDUCED BY (CH3CN)3Cr(CO)3 Piero Berno, Alberto Ceccon, Alessandro Gambaro, and Alfonso Venzo Dipartimento ... 3. M,I. Foreman, GR Knox, PL Pauson, KH Todd, and WE Watts, ;J. Chem ...
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Natural Product Research, 2006
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Journal of Organometallic Chemistry, 2000
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Journal of Organometallic Chemistry, 1983
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Journal of Organometallic Chemistry, 1983
... AND TRI-PHENYLMETHYL ANIONS IN BENZYLIDENE^-TRICARBONYL-(CYCLOHEXADIENYL) CHROMIUM(O) ALBERTO... more ... AND TRI-PHENYLMETHYL ANIONS IN BENZYLIDENE^-TRICARBONYL-(CYCLOHEXADIENYL) CHROMIUM(O) ALBERTO CECCON, ALESSANDRO GAMBARO, ANNA MARIA ROMANIN ... J Amer Chem Soc, 85 (1963) 2328, (b) JB Grutzner, JM LawlorandLH Jackman, J Amer ...
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Inorganic Chemistry, 2010
Deprotonation of 1-methylcytosine (1-MeCy) and 9-methyladenine (9-MeAd) promoted by cis-[L(2)Pt(m... more Deprotonation of 1-methylcytosine (1-MeCy) and 9-methyladenine (9-MeAd) promoted by cis-[L(2)Pt(mu-OH)](2)(NO(3))(2) (L = PPh(3), PMePh(2), (1)/(2)dppe) in PhCN causes the irreversible insertion of a nitrile molecule into the Pt-N4 and Pt-N6 bonds of the cytosinate and adeninate ligands, respectively, to form the stable azametallacycle complexes cis-[L(2)PtNH=C(Ph){1-MeCy(-2H)}]NO(3) (L = PPh(3), 1; PMePh(2), 2; (1)/(2)dppe, 3) and cis-[L(2)PtNH=C(Ph){9-MeAd(-2H)}]NO(3) (L = PPh(3), 4; PMePh(2), 5) containing the deprotonated form of the molecules (Z)-9-N-(1-methyl-2-oxo-2,3-dihydropyrimidin-4(1H)-ylidene)benzimidamide and (Z)-N-(9-methyl-1H-purin-6(9H)-ylidene)benzimidamide. Single-crystal X-ray analyses of 2 and 4 show the metal coordinated to the N3 cytosine site [Pt-N3 = 2.112(7) A] and to the N1 site of adenine [Pt-N1 = 2.116(6) A] and to the nitrogen atom of the inserted benzonitrile [Pt-N2 = 2.043(6) and 2.010(6) A in 2 and 4, respectively], with the exocyclic nucleobase amino nitrogen bound to the carbon atom of the CN group. Complex 2, in solution, undergoes a dynamic process related to a partially restricted rotation around Pt-P bonds, arising from a steric interaction of the oxygen atom of the cytosine with one ring of the phosphine ligands. The reaction of 4 with acetylacetone (Hacac) causes the quantitative protonation of the anionic ligand, affording the acetylacetonate complex cis-[(PPh(3))(2)Pt(acac)]NO(3) and the free benzimidamide NH=C(Ph){9-MeAd(-H)}. In the same experimental conditions, complex 3 reacts with Hacac only partially.
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Angewandte Chemie, 2006
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Organometallics, 2002
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Natural Product Research, 2006
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Journal of the Chemical Society, Chemical Communications, 1986
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Designed Monomers and Polymers, 2007
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Journal of Organometallic Chemistry, Sep 27, 1983
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Tetrahedron Letters, 1988
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Journal of the Chemical Society Chemical Communications, 1985
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Journal of Organometallic Chemistry, Oct 23, 1984
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Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1981
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Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1980
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Journal of the Chemical Society, Perkin Transactions 2, 1978
... spectroscopic observation of the com-plexed radical anion was not possible for acetophenone-t... more ... spectroscopic observation of the com-plexed radical anion was not possible for acetophenone-tricarbonylchromium in acetonit rile, tet rahydrof uran, and dimethyl ... The solution was allowed to react with excess of lithium following the procedure of Pearce.12 The crude bis-(3,5-t ...
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Transition Metal Chemistry, 1975
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Tetrahedron Letters, 1988
... pic THE FACILE REARRANGEMENT OF 1PHENYLINDENE TO 3PHENYL1NDENE INDUCED BY (CH3CN)3Cr(CO)3 Pie... more ... pic THE FACILE REARRANGEMENT OF 1PHENYLINDENE TO 3PHENYL1NDENE INDUCED BY (CH3CN)3Cr(CO)3 Piero Berno, Alberto Ceccon, Alessandro Gambaro, and Alfonso Venzo Dipartimento ... 3. M,I. Foreman, GR Knox, PL Pauson, KH Todd, and WE Watts, ;J. Chem ...
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Natural Product Research, 2006
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Journal of Organometallic Chemistry, 2000
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Journal of Organometallic Chemistry, 1983
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Journal of Organometallic Chemistry, 1983
... AND TRI-PHENYLMETHYL ANIONS IN BENZYLIDENE^-TRICARBONYL-(CYCLOHEXADIENYL) CHROMIUM(O) ALBERTO... more ... AND TRI-PHENYLMETHYL ANIONS IN BENZYLIDENE^-TRICARBONYL-(CYCLOHEXADIENYL) CHROMIUM(O) ALBERTO CECCON, ALESSANDRO GAMBARO, ANNA MARIA ROMANIN ... J Amer Chem Soc, 85 (1963) 2328, (b) JB Grutzner, JM LawlorandLH Jackman, J Amer ...
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Inorganic Chemistry, 2010
Deprotonation of 1-methylcytosine (1-MeCy) and 9-methyladenine (9-MeAd) promoted by cis-[L(2)Pt(m... more Deprotonation of 1-methylcytosine (1-MeCy) and 9-methyladenine (9-MeAd) promoted by cis-[L(2)Pt(mu-OH)](2)(NO(3))(2) (L = PPh(3), PMePh(2), (1)/(2)dppe) in PhCN causes the irreversible insertion of a nitrile molecule into the Pt-N4 and Pt-N6 bonds of the cytosinate and adeninate ligands, respectively, to form the stable azametallacycle complexes cis-[L(2)PtNH=C(Ph){1-MeCy(-2H)}]NO(3) (L = PPh(3), 1; PMePh(2), 2; (1)/(2)dppe, 3) and cis-[L(2)PtNH=C(Ph){9-MeAd(-2H)}]NO(3) (L = PPh(3), 4; PMePh(2), 5) containing the deprotonated form of the molecules (Z)-9-N-(1-methyl-2-oxo-2,3-dihydropyrimidin-4(1H)-ylidene)benzimidamide and (Z)-N-(9-methyl-1H-purin-6(9H)-ylidene)benzimidamide. Single-crystal X-ray analyses of 2 and 4 show the metal coordinated to the N3 cytosine site [Pt-N3 = 2.112(7) A] and to the N1 site of adenine [Pt-N1 = 2.116(6) A] and to the nitrogen atom of the inserted benzonitrile [Pt-N2 = 2.043(6) and 2.010(6) A in 2 and 4, respectively], with the exocyclic nucleobase amino nitrogen bound to the carbon atom of the CN group. Complex 2, in solution, undergoes a dynamic process related to a partially restricted rotation around Pt-P bonds, arising from a steric interaction of the oxygen atom of the cytosine with one ring of the phosphine ligands. The reaction of 4 with acetylacetone (Hacac) causes the quantitative protonation of the anionic ligand, affording the acetylacetonate complex cis-[(PPh(3))(2)Pt(acac)]NO(3) and the free benzimidamide NH=C(Ph){9-MeAd(-H)}. In the same experimental conditions, complex 3 reacts with Hacac only partially.
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Angewandte Chemie, 2006
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Iron oxide is a key multi-functional material in many different fields of modern technology. The ... more Iron oxide is a key multi-functional material in many different fields of modern technology. The β-Fe2O3 cubic phase, one of the least studied Fe–O systems, was obtained by Chemical Vapor Deposition (CVD) using for the first time a Fe(II) β-diketonate diamine complex, Fe(hfa)2·TMEDA, as the molecular source (hfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate; TMEDA = N,N,N′,N′-tetramethylethylenediamine). The strong visible light absorption of β-Fe2O3 deposits highlights their possible functional application in photocatalytic hydrogen production under solar light. A comprehensive investigation on the Fe(II) complex, performed by a joint experimental–theoretical approach, explains the molecular origin of its excellent thermal behaviour and reveals why this species is a successful precursor for the CVD of iron oxide nanostructures.
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