The Experts below are selected from a list of 909 Experts worldwide ranked by ideXlab platform
Gilberto Rossetto - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of calcium β diketonate complexes x ray crystal and molecular structures of ca tmhd 2 2 18 crown 6 ca dpp 2 thf 2 and ca dpp 2 Triglyme
Dalton Transactions, 2010Co-Authors: Naida El Habra, Franco Benetollo, Maurizio Casarin, Marco Bolzan, Andrea Sartori, Gilberto RossettoAbstract:Reactions of 2,2,6,6-tetramethyl-3,5-heptanedione (Htmhd), 1,1,1,5,5,5-hexafluoro-2,4-pentanedione (Hhfa) or 1,3-diphenyl-1,3-propanedione (Hdpp) with calcium methoxide in hexane or toluene afford the corresponding known oligomeric β-diketonates: [Ca3(tmhd)6], [{Ca(hfa)2}n] and [{Ca(dpp)2}n]. The complexes react with tetrahydrofuran, 2,5,8,11-tetraoxadodecane (Triglyme) or 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) leading to the formation of the new mononuclear [Ca(dpp)2(thf)2], [Ca(dpp)2(Triglyme)] and dinuclear [{Ca(dpp)2}2(18-crown-6)] and [{Ca(tmhd)2}2(18-crown-6)] adducts. The obtained complexes were characterized by elemental analyses, IR, 1H and 13C NMR spectroscopies; moreover, single crystal X-ray diffraction measurements were also carried out for: [{Ca(tmhd)2}2(18-crown-6)], [Ca(dpp)2(thf)2] and [Ca(dpp)2(Triglyme)].
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Synthesis and characterization of calcium β-diketonate complexes. X-Ray crystal and molecular structures of: [{Ca(tmhd)2}2(18-crown-6)], [Ca(dpp)2(thf)2] and [Ca(dpp)2(Triglyme)]
Dalton Transactions, 2010Co-Authors: Naida El Habra, Franco Benetollo, Maurizio Casarin, Marco Bolzan, Andrea Sartori, Gilberto RossettoAbstract:Reactions of 2,2,6,6-tetramethyl-3,5-heptanedione (Htmhd), 1,1,1,5,5,5-hexafluoro-2,4-pentanedione (Hhfa) or 1,3-diphenyl-1,3-propanedione (Hdpp) with calcium methoxide in hexane or toluene afford the corresponding known oligomeric β-diketonates: [Ca3(tmhd)6], [{Ca(hfa)2}n] and [{Ca(dpp)2}n]. The complexes react with tetrahydrofuran, 2,5,8,11-tetraoxadodecane (Triglyme) or 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) leading to the formation of the new mononuclear [Ca(dpp)2(thf)2], [Ca(dpp)2(Triglyme)] and dinuclear [{Ca(dpp)2}2(18-crown-6)] and [{Ca(tmhd)2}2(18-crown-6)] adducts. The obtained complexes were characterized by elemental analyses, IR, 1H and 13C NMR spectroscopies; moreover, single crystal X-ray diffraction measurements were also carried out for: [{Ca(tmhd)2}2(18-crown-6)], [Ca(dpp)2(thf)2] and [Ca(dpp)2(Triglyme)].
E. Jeanneau - One of the best experts on this subject based on the ideXlab platform.
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Hydrolysis of a (2-Propanol)yttrium Triiodide Complex in the Presence of Glymes: Synthesis and X-ray Structures of Hydroxo-Bridged Dinuclear Yttrium Complexes and Their Applications in Materials Science
European Journal of Inorganic Chemistry, 2007Co-Authors: S. Mishra, S. Daniele, L. G. Hubert-pfalzgraf, E. JeanneauAbstract:The reactions of (2-propanol)yttrium triiodide, Y(iPrOH)4I3, with stoichiometric amounts of water in the presence of di-, tri-, and tetraglyme yield a facile synthetic route to hydroxo-bridged, centrosymmetric dimeric yttrium complexes. These ionic derivatives, [Y2L2(-OH)2(H2O)x(ROH)y]I4 [1: L = Triglyme, x = 2, y = 2, R = iPr; 2: L = tetraglyme, x = 2, y = 0; 3·2EtOH: L = diglyme, x = 2, y = 4, R = Et; 4·2EtOH: L = Triglyme, x = 4, y = 0; 5: L = tetraglyme, x = 2, y = 2, R = Et] have been characterized by elemental analysis, IR and 1H NMR spectroscopy, as well as by single-crystal X-ray diffraction for 3, 4, and 5. Preliminary results on the utility of these ionic derivatives as potential sources of yttrium oxide in high Tc superconductors are also presented.
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Hydrolysis of a (2-Propanol)yttrium Triiodide Complex in the Presence of Glymes: Synthesis and X-ray Structures of Hydroxo-Bridged Dinuclear Yttrium Complexes and Their Applications in Materials Science
European Journal of Inorganic Chemistry, 2007Co-Authors: S. Mishra, S. Daniele, L. G. Hubert-pfalzgraf, E. JeanneauAbstract:The reactions of (2-propanol)yttrium triiodide, Y(iPrOH)4I3, with stoichiometric amounts of water in the presence of di-, tri-, and tetraglyme yield a facile synthetic route to hydroxo-bridged, centrosymmetric dimeric yttrium complexes. These ionic derivatives, [Y2L2(μ-OH)2(H2O)x(ROH)y]I4 [1: L = Triglyme, x = 2, y = 2, R = iPr; 2: L = tetraglyme, x = 2, y = 0; 3·2EtOH: L = diglyme, x = 2, y = 4, R = Et; 4·2EtOH: L = Triglyme, x = 4, y = 0; 5: L = tetraglyme, x = 2, y = 2, R = Et] have been characterized by elemental analysis, IR and 1H NMR spectroscopy, as well as by single-crystal X-ray diffraction for 3, 4, and 5. Preliminary results on the utility of these ionic derivatives as potential sources of yttrium oxide in high Tc superconductors are also presented.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Naida El Habra - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of calcium β diketonate complexes x ray crystal and molecular structures of ca tmhd 2 2 18 crown 6 ca dpp 2 thf 2 and ca dpp 2 Triglyme
Dalton Transactions, 2010Co-Authors: Naida El Habra, Franco Benetollo, Maurizio Casarin, Marco Bolzan, Andrea Sartori, Gilberto RossettoAbstract:Reactions of 2,2,6,6-tetramethyl-3,5-heptanedione (Htmhd), 1,1,1,5,5,5-hexafluoro-2,4-pentanedione (Hhfa) or 1,3-diphenyl-1,3-propanedione (Hdpp) with calcium methoxide in hexane or toluene afford the corresponding known oligomeric β-diketonates: [Ca3(tmhd)6], [{Ca(hfa)2}n] and [{Ca(dpp)2}n]. The complexes react with tetrahydrofuran, 2,5,8,11-tetraoxadodecane (Triglyme) or 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) leading to the formation of the new mononuclear [Ca(dpp)2(thf)2], [Ca(dpp)2(Triglyme)] and dinuclear [{Ca(dpp)2}2(18-crown-6)] and [{Ca(tmhd)2}2(18-crown-6)] adducts. The obtained complexes were characterized by elemental analyses, IR, 1H and 13C NMR spectroscopies; moreover, single crystal X-ray diffraction measurements were also carried out for: [{Ca(tmhd)2}2(18-crown-6)], [Ca(dpp)2(thf)2] and [Ca(dpp)2(Triglyme)].
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Synthesis and characterization of calcium β-diketonate complexes. X-Ray crystal and molecular structures of: [{Ca(tmhd)2}2(18-crown-6)], [Ca(dpp)2(thf)2] and [Ca(dpp)2(Triglyme)]
Dalton Transactions, 2010Co-Authors: Naida El Habra, Franco Benetollo, Maurizio Casarin, Marco Bolzan, Andrea Sartori, Gilberto RossettoAbstract:Reactions of 2,2,6,6-tetramethyl-3,5-heptanedione (Htmhd), 1,1,1,5,5,5-hexafluoro-2,4-pentanedione (Hhfa) or 1,3-diphenyl-1,3-propanedione (Hdpp) with calcium methoxide in hexane or toluene afford the corresponding known oligomeric β-diketonates: [Ca3(tmhd)6], [{Ca(hfa)2}n] and [{Ca(dpp)2}n]. The complexes react with tetrahydrofuran, 2,5,8,11-tetraoxadodecane (Triglyme) or 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) leading to the formation of the new mononuclear [Ca(dpp)2(thf)2], [Ca(dpp)2(Triglyme)] and dinuclear [{Ca(dpp)2}2(18-crown-6)] and [{Ca(tmhd)2}2(18-crown-6)] adducts. The obtained complexes were characterized by elemental analyses, IR, 1H and 13C NMR spectroscopies; moreover, single crystal X-ray diffraction measurements were also carried out for: [{Ca(tmhd)2}2(18-crown-6)], [Ca(dpp)2(thf)2] and [Ca(dpp)2(Triglyme)].
S. Mishra - One of the best experts on this subject based on the ideXlab platform.
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Hydrolysis of a (2-Propanol)yttrium Triiodide Complex in the Presence of Glymes: Synthesis and X-ray Structures of Hydroxo-Bridged Dinuclear Yttrium Complexes and Their Applications in Materials Science
European Journal of Inorganic Chemistry, 2007Co-Authors: S. Mishra, S. Daniele, L. G. Hubert-pfalzgraf, E. JeanneauAbstract:The reactions of (2-propanol)yttrium triiodide, Y(iPrOH)4I3, with stoichiometric amounts of water in the presence of di-, tri-, and tetraglyme yield a facile synthetic route to hydroxo-bridged, centrosymmetric dimeric yttrium complexes. These ionic derivatives, [Y2L2(-OH)2(H2O)x(ROH)y]I4 [1: L = Triglyme, x = 2, y = 2, R = iPr; 2: L = tetraglyme, x = 2, y = 0; 3·2EtOH: L = diglyme, x = 2, y = 4, R = Et; 4·2EtOH: L = Triglyme, x = 4, y = 0; 5: L = tetraglyme, x = 2, y = 2, R = Et] have been characterized by elemental analysis, IR and 1H NMR spectroscopy, as well as by single-crystal X-ray diffraction for 3, 4, and 5. Preliminary results on the utility of these ionic derivatives as potential sources of yttrium oxide in high Tc superconductors are also presented.
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Hydrolysis of a (2-Propanol)yttrium Triiodide Complex in the Presence of Glymes: Synthesis and X-ray Structures of Hydroxo-Bridged Dinuclear Yttrium Complexes and Their Applications in Materials Science
European Journal of Inorganic Chemistry, 2007Co-Authors: S. Mishra, S. Daniele, L. G. Hubert-pfalzgraf, E. JeanneauAbstract:The reactions of (2-propanol)yttrium triiodide, Y(iPrOH)4I3, with stoichiometric amounts of water in the presence of di-, tri-, and tetraglyme yield a facile synthetic route to hydroxo-bridged, centrosymmetric dimeric yttrium complexes. These ionic derivatives, [Y2L2(μ-OH)2(H2O)x(ROH)y]I4 [1: L = Triglyme, x = 2, y = 2, R = iPr; 2: L = tetraglyme, x = 2, y = 0; 3·2EtOH: L = diglyme, x = 2, y = 4, R = Et; 4·2EtOH: L = Triglyme, x = 4, y = 0; 5: L = tetraglyme, x = 2, y = 2, R = Et] have been characterized by elemental analysis, IR and 1H NMR spectroscopy, as well as by single-crystal X-ray diffraction for 3, 4, and 5. Preliminary results on the utility of these ionic derivatives as potential sources of yttrium oxide in high Tc superconductors are also presented.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
S. Daniele - One of the best experts on this subject based on the ideXlab platform.
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Hydrolysis of a (2-Propanol)yttrium Triiodide Complex in the Presence of Glymes: Synthesis and X-ray Structures of Hydroxo-Bridged Dinuclear Yttrium Complexes and Their Applications in Materials Science
European Journal of Inorganic Chemistry, 2007Co-Authors: S. Mishra, S. Daniele, L. G. Hubert-pfalzgraf, E. JeanneauAbstract:The reactions of (2-propanol)yttrium triiodide, Y(iPrOH)4I3, with stoichiometric amounts of water in the presence of di-, tri-, and tetraglyme yield a facile synthetic route to hydroxo-bridged, centrosymmetric dimeric yttrium complexes. These ionic derivatives, [Y2L2(-OH)2(H2O)x(ROH)y]I4 [1: L = Triglyme, x = 2, y = 2, R = iPr; 2: L = tetraglyme, x = 2, y = 0; 3·2EtOH: L = diglyme, x = 2, y = 4, R = Et; 4·2EtOH: L = Triglyme, x = 4, y = 0; 5: L = tetraglyme, x = 2, y = 2, R = Et] have been characterized by elemental analysis, IR and 1H NMR spectroscopy, as well as by single-crystal X-ray diffraction for 3, 4, and 5. Preliminary results on the utility of these ionic derivatives as potential sources of yttrium oxide in high Tc superconductors are also presented.
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Hydrolysis of a (2-Propanol)yttrium Triiodide Complex in the Presence of Glymes: Synthesis and X-ray Structures of Hydroxo-Bridged Dinuclear Yttrium Complexes and Their Applications in Materials Science
European Journal of Inorganic Chemistry, 2007Co-Authors: S. Mishra, S. Daniele, L. G. Hubert-pfalzgraf, E. JeanneauAbstract:The reactions of (2-propanol)yttrium triiodide, Y(iPrOH)4I3, with stoichiometric amounts of water in the presence of di-, tri-, and tetraglyme yield a facile synthetic route to hydroxo-bridged, centrosymmetric dimeric yttrium complexes. These ionic derivatives, [Y2L2(μ-OH)2(H2O)x(ROH)y]I4 [1: L = Triglyme, x = 2, y = 2, R = iPr; 2: L = tetraglyme, x = 2, y = 0; 3·2EtOH: L = diglyme, x = 2, y = 4, R = Et; 4·2EtOH: L = Triglyme, x = 4, y = 0; 5: L = tetraglyme, x = 2, y = 2, R = Et] have been characterized by elemental analysis, IR and 1H NMR spectroscopy, as well as by single-crystal X-ray diffraction for 3, 4, and 5. Preliminary results on the utility of these ionic derivatives as potential sources of yttrium oxide in high Tc superconductors are also presented.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
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Synthesis, characterisation and grafting onto silica of alkoxide-triflate lanthanum complexes. Molecular structure of La(OC6H3-2,6-Me2)2(η1-O3SCF3)(tetraglyme)
Polyhedron, 2003Co-Authors: S. Daniele, L. G. Hubert-pfalzgraf, Jacqueline VaissermannAbstract:Reactions between lanthanum triflate adducts La(OTf) 3 (LL x ) (OTf = O 3 SCF 3 ; LL 1 = Triglyme, LL 2 = tetraglyme] and 2 equiv. of LiOAr (Ar = C 6 H 3 -2,6-Me 2 ) in THF lead to La(OTf)(OC6H3-2,6-Me 2 ) 2 (LLX) [LL 1 = Triglyme(1); LL 2 = tetraglyme (2)] derivatives. They were characterised by elemental analysis, FT IR and NMR ( 1 H, 1 3 C, 1 9 F). The adduct with tetraglyme (2) was also characterised by single crystal X-ray diffraction. The metal is octacoordinated, surrounded by anionic monodentate ligands including the triflate and a pentadentate glyme. The La-O bond distances spread over the range 2.225(3)-2.692(3) A with the ranking La-O(Ar) < La-O(Tf) < La-O(tetraglyme). The grafting of 1 onto silica led to an hybrid material, characterised by elemental analysis, FT IR, 1 3 C CP-MAS NMR and XPS. It was used as hydroxymethylation catalyst of silyl enol ether in mild conditions.
