Strategies for the Synthesis of Functionalized Cyclosiloxanes and the Addition and Substitution Reactions of an Al

Veith, Michael; Rammo, Andreas; Jarczyk, Maria; Hüch, Volker

doi:10.1007/s007060050159

Cited by 4 publications

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“…The average Al-O-distances (1.72(9) Å ) are comparable with those of the lithium-alumo-siloxane [Ph 2 SiO] 8 [AlO(OLi)] 4 AE 4OEt 2 (average value of the Al-O bond length 1.729(4) Å ) [6]. In Fig.…”

Section: Syntheses and Structures Ofsupporting

confidence: 61%

“…For both sodium atoms the distances are in the range of bonding between sodium and aromatic p-systems (Na-aromatic p-system: 2.8-3.2 Å [15][16][17][18][19]; found: Na(1)-C 2.88(2) Å , Na(4A)-pC 3.12 (2), Na(4B)-pC 2.66(2) Å ). No spectral proof for the interaction between the sodium atoms and the aromatic p-systems has been obtained from the solid state 13 C-CP-MAS NMR spectrum of the compound [Ph 2 SiO] 8 [AlO 2 (Na)] 4 AE 5(THF) by a signal splitting of C-atoms of the phenyl group, due to the quadrupole nucleus 23 Na because of resolution problems. The asymmetric distribution of the ligands leads to the point symmetry C 1 in the molecule.…”

Section: Syntheses and Structures Ofmentioning

confidence: 99%

“…Metal compounds like LiNH 2 , LiPh or dicyclopentadienylegermanium or -tin can replace up to four acidic hydrogen atoms in [Ph 2 SiO] 8 [11,12]. We report here the syntheses and structures of two new metal derivatives, the metal being either sodium or zinc.…”

Section: Introductionmentioning

confidence: 98%

“…The IR-spectrum of single crystals of the sodium compound has no absorptions in the OH-region between 3600 and 3100 cm À1 , whereas the zinc-compound has weak absorption peaks at around 3400 cm À1 . The reaction pathway leading to [Ph 2 SiO] 8 is not clear and the composition of the compound follows from elemental analysis and especially from the X-ray structure determination (see below). It might be possible that CH 3 -Zn-OH intermediates play an important part.…”

Section: Introductionmentioning

confidence: 99%

“…The alumosiloxane [Ph 2 SiO] 8 [AlO(OH)] 4 frequently reacts with bases like diethyl ether, tetrahydrofuran, triethylamine, pyridine to form adducts through hydrogen bonding using the acidic OH-groups in the molecule [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Two new metal derivates of the alumosiloxane [Ph2SiO]8[AlO(OH)]4: [Ph2SiO]8[AlO2(Na)]4·5(THF) and [Ph2SiO]8[AlO(OH)]2[AlO2]2[Zn(OH)]2·2(OEt2)

Veith¹,

Hreleva-Carparrotti²,

Hüch³

2007

Journal of Organometallic Chemistry

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Section: Syntheses and Structures Ofsupporting

confidence: 61%

Section: Syntheses and Structures Ofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Two new metal derivates of the alumosiloxane [Ph2SiO]8[AlO(OH)]4: [Ph2SiO]8[AlO2(Na)]4·5(THF) and [Ph2SiO]8[AlO(OH)]2[AlO2]2[Zn(OH)]2·2(OEt2)

Veith¹,

Hreleva-Carparrotti²,

Hüch³

2007

Journal of Organometallic Chemistry

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Acid‐Base Interactions of Pyrazine, Ethyl Acetate, Di‐alcohols, and Lysine with the cyclic Alumosiloxane (Ph₂SiO)₈[Al(O)OH]₄ in View of Mimicking Al₂O₃(H₂O) Surface Reactions

Veith

Kolano

Hüch

2020

Zeitschrift anorg allge chemie

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The etherate of (Ph 2 SiO) 8 [Al(O)OH] 4 can be transformed into the pyrazine adduct (Ph 2 SiO) 8 [Al(O)OH] 4 •3N(C 2 H 2) 2 N (1), the ethyl acetate adduct (Ph 2 SiO) 8 [Al(O)OH] 4 •3H 3 C-C(O)OC 2 H 5 (2), the 1,6-hexane diol adduct (Ph 2 SiO) 8 [Al(O)OH] 4 •2HO-CH 2 (CH 2) 4 CH 2-OH (3) and the 1,4-cyclohexane diol adduct (Ph 2 SiO) 8 [Al(O) OH] 4 •4HO-CH(CH 2 CH 2) 2 CH-OH (4). In all compounds the OH groups of the starting material bind to the bases through O-H•••N (1) or O-H•••O hydrogen bonds (2, 3, 4) as found from single-crystal Xray diffraction analyses. Whereas in 1 only three of the central OH groups bind to the pyrazines, in 2 two of them bind to the same carbonyl oxygen atom of the ethyl acetate resulting in an unprecedented O-H•••O•••H-O double hydrogen bridge. The hexane diol adduct 3 in

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New types of alumosiloxanes by the reaction of the bicyclic compound Al2[(OPh2Si)2O]3·2 Et2O with water in the presence of donor ligands – A status report

Veith

Sahin

Rammo

et al. 2009

Comptes Rendus. Chimie

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The selective synthesis of new types of alumosiloxanes can be achieved by the reaction of the bicyclic compound Al 2 [(OPh 2 Si) 2 O] 3 $2 Et 2 O (3) with water in donor solvents like acetone or THF, leading to the polycyclic THF adduct [(Ph 2 SiO) 8 (AlO 1,5 ) 4 ]$2 THF, (7), and to the polycyclic alumosiloxane [(Ph 2 SiO) 8 (AlO(OH)) 4 ]$4 Me 2 C]O (8), respectively. In the presence of the base triethylamine, the starting compound 3 gives rise to two other condensation products. At medium temperatures (50-60 C) in toluene the dispiro ''alumosilicate'' [(Ph 2 SiO) 2 O] 2 {Al[(Ph 2 SiO) 2 OH$NEt 3 ]} 2 (9) is formed and at higher temperatures under reflux in toluene, the product [(Ph 2 SiO) 2 O]Al[(Ph 2 SiO) 2 OH$NEt 3 ] (10) is generated. The spirocyclic compounds 9 and 10 present the first isolated ''alumosilicates'' with six-membered O(SiO) 2 Al cycles. These new types of alumosiloxanes and ''alumosilicates'' have been characterised by spectroscopic methods as well as by single crystal X-ray analyses.

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Strategies for the Synthesis of Functionalized Cyclosiloxanes and the Addition and Substitution Reactions of an Al

Cited by 4 publications

References 0 publications

Two new metal derivates of the alumosiloxane [Ph2SiO]8[AlO(OH)]4: [Ph2SiO]8[AlO2(Na)]4·5(THF) and [Ph2SiO]8[AlO(OH)]2[AlO2]2[Zn(OH)]2·2(OEt2)

Two new metal derivates of the alumosiloxane [Ph2SiO]8[AlO(OH)]4: [Ph2SiO]8[AlO2(Na)]4·5(THF) and [Ph2SiO]8[AlO(OH)]2[AlO2]2[Zn(OH)]2·2(OEt2)

Acid‐Base Interactions of Pyrazine, Ethyl Acetate, Di‐alcohols, and Lysine with the cyclic Alumosiloxane (Ph₂SiO)₈[Al(O)OH]₄ in View of Mimicking Al₂O₃(H₂O) Surface Reactions

New types of alumosiloxanes by the reaction of the bicyclic compound Al2[(OPh2Si)2O]3·2 Et2O with water in the presence of donor ligands – A status report

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Strategies for the Synthesis of Functionalized Cyclosiloxanes and the Addition and Substitution Reactions of an Al

Cited by 4 publications

References 0 publications

Two new metal derivates of the alumosiloxane [Ph2SiO]8[AlO(OH)]4: [Ph2SiO]8[AlO2(Na)]4·5(THF) and [Ph2SiO]8[AlO(OH)]2[AlO2]2[Zn(OH)]2·2(OEt2)

Two new metal derivates of the alumosiloxane [Ph2SiO]8[AlO(OH)]4: [Ph2SiO]8[AlO2(Na)]4·5(THF) and [Ph2SiO]8[AlO(OH)]2[AlO2]2[Zn(OH)]2·2(OEt2)

Acid‐Base Interactions of Pyrazine, Ethyl Acetate, Di‐alcohols, and Lysine with the cyclic Alumosiloxane (Ph2SiO)8[Al(O)OH]4 in View of Mimicking Al2O3(H2O) Surface Reactions

New types of alumosiloxanes by the reaction of the bicyclic compound Al2[(OPh2Si)2O]3·2 Et2O with water in the presence of donor ligands – A status report

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Acid‐Base Interactions of Pyrazine, Ethyl Acetate, Di‐alcohols, and Lysine with the cyclic Alumosiloxane (Ph₂SiO)₈[Al(O)OH]₄ in View of Mimicking Al₂O₃(H₂O) Surface Reactions