Synthese und Kristallstruktur von Dinatrium-di-μ/-oxo-bis[trihydroxo-methylantimonat(V)] / Synthesis and Crystal Structure of Disodium-di-μ-oxo-bis[trihydroxo-methylantimonate(V)]

1991 ◽  
Vol 46 (2) ◽  
pp. 139-142 ◽  
Author(s):  
Markus Wieber ◽  
Udo Simonis ◽  
Dieter Kraft
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Thermal Decomposition ◽  
Sodium Hydroxide ◽  
Spectroscopic Properties ◽  
Membered Ring ◽  
Dimeric Molecule ◽  
Synthesis And Crystal Structure

The oxidation of dialkoxymethylstibine with hydrogen peroxide in the presence of sodium hydroxide leads to the formation of disodium-di-μ-oxo-bis[trihydroxo-methylantimonate(V)]. The salt can be synthesized also by dissolving methanestibonic acid in an aqueous solution of sodium hydroxide. The crystal structure has been determined; it shows a dimeric molecule containing a four-membered ring with Sb -O -Sb linkages. Thermal decomposition and spectroscopic properties o f the com pound are discussed.

Synthese und Kristallstruktur von Cl3Ti[N(SiMe2Cl)(SiMe2NH2)] / Synthesis and Crystal Structure of Cl3Ti[N(SiMe2Cl)(SiMe2N H2)]

1996 ◽  
Vol 51 (8) ◽  
pp. 1141-1144 ◽  
Author(s):  
R. Buheitel ◽  
W. Milius ◽  
W. Schnick
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Determination ◽  
Membered Ring ◽  
Single Crystal Structure ◽  
Crystal Structure Determination ◽  
Central Feature ◽  
Synthesis And Crystal Structure

Cl3Ti[N(SiMe2Cl)(SiMe2NH2)] is yielded by reaction of TiCl4 with two molecules ClMe2SiNHSiMe3. A single crystal structure determination (P 21/n, a = 747.12(2), b = 1294.1(3), c = 1496.7(3) pm, β = 90.30(3)°, Z = 4) shows a planar four-membered ring Ti-N-Si-N as the central feature of the monomers formed by a weak coordinative bond of the NH2 group to the Ti atoms. The monomers are connected to give dimers via two Cl bridges linked to the Ti atoms.

scholarly journals Benzylation and oxidation of arabinogalactan

2018 ◽  
Author(s):  
Е.А. Максимова ◽  
А.В. Васильев
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Sodium Hydroxide ◽  
Ferric Chloride ◽  
13C Nmr ◽  
Benzyl Chloride ◽  
Carboxyl Groups ◽  
Nmr Spectrum ◽  
Aromatic Carbon

Проведено бензилирование арабиногалактана путем его реакции с бензилхлоридом в присутствии гидроксида натрия. Получено бензилированное производное арабиногалактана с выходом 90%. Бензилированное производное представляет собой гидрофобный клееподобный невысыхающий материал. В спектре ЯМР 13С бензилированного производного арабиногалактана содержатся сигналы в областях 130,0–143,3 м.д., отвечающие ароматическим атомам углерода бензильной группы. Осуществлено окисление арабиногалактана путем его реакции с перекисью водорода в присутствии хлорида железа (III) в водном растворе. Окисленное производное представляет собой маслообразное вещество. В спектре ЯМР 13С окисленного арабиногалактана присутствуют сигналы в области 158–173 м.д., соответствующие карбоксильным группам. Benzylation of arabinogalactan was carried by reaction with benzyl chloride in the presence of sodium hydroxide. The benzylated derivative was obtained in a yield of 90%. Benzylated arabinogalactan is hydrophobic, glue-like, non-drying material. 13C NMR spectrum of benzylated arabinogalactan contains signals in the range of 130.0–143.2 ppm. corresponding to the aromatic carbon atoms of the benzyl group. The oxidation of arabinogalactan by reaction with hydrogen peroxide in the presence of ferric chloride (III) in aqueous solution was done. The oxidized arabinogalactan is an oilish material. 13C NMR spectrum of oxidized arabinogalactan contains signals at 158–173 ppm corresponding to carboxyl groups.

scholarly journals Synthesis and crystal structure of 1,3-di-tert-butyl-2-chloro-4,4-diphenyl-1,3,2λ3,4-diazaphosphasiletidine

2019 ◽  
Vol 75 (3) ◽  
pp. 405-409 ◽  
Author(s):  
Dennis Mo ◽  
Walter Frank
Keyword(s):  
Crystal Structure ◽  
Membered Ring ◽  
Mean Deviation ◽  
Monoclinic Space Group ◽  
Asymmetric Unit ◽  
Reduced Pressure ◽  
Synthesis And Crystal Structure ◽  
Compound C ◽  
Crude Product ◽  
Phenyl Rings

The chemical reaction of dilithiumN,N′-di(tbutyl)-Si,Si-diphenylsilanediamide and PCl3yielded an off-white solid. Sublimation of the crude product under reduced pressure at elevated temperature gave colourless prismatic crystals of the title compound, C20H28ClN2PSi, which crystallizes in the non-centrosymmetric monoclinic space groupCc.The asymmetric unit of the crystal structure contains one molecule and it is dominated by the central SiN2P four-membered ring, which is almost planar with a mean deviation of the atoms from the best plane of 0.014 Å. The angles between the plane defined by the silicon atom and the two nitrogen atoms and the best planes of theSi-phenyl groups are 85.1 (2) and 77.4 (2)°, with the tilt of the phenyl rings in the opposite direction. Bothtert-butyl groups suffer from a two-position rotational disorder with site occupancies of 0.752 (6)/0.248 (6) and 0.878 (9)/0.122 (9). The P—Cl bond [2.2078 (17) Å] is remarkably elongated compared to the P—Cl distance in PCl3[2.034 Å; Galy & Enjalbert (1982).J. Solid State Chem.44, 1–23].

scholarly journals On verdigris, part II: synthesis of the 2-1-5 phase, Cu3(CH3COO)4(OH)2·5H2O, by long-term crystallisation from aqueous solution at room temperature

2018 ◽  
Vol 47 (25) ◽  
pp. 8209-8220 ◽  
Author(s):  
Sebastian Bette ◽  
Reinhard K. Kremer ◽  
Gerhard Eggert ◽  
Robert E. Dinnebier
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Room Temperature ◽  
Spectroscopic Properties

Long-term crystallisation led to the formation of the 2-1-5 verdigris phase (Cu3(CH3COO)4(OH)2·5H2O). The crystal structure, as well as magnetic, thermal and spectroscopic properties, was investigated.

Kristallstruktur des Doppelkomplexsalzes trans-(py2CH2)[Pt(OH)2(ox)2]transs-(py2CH2)[Pt(OH)(ox)2(H2O)]2·4H2O / Crystal Structure of the Double Complex Salt trans-(py2CH2)[Pt(OH)2(ox)2](H2O)]2·4H2O

1998 ◽  
Vol 53 (5-6) ◽  
pp. 569-572 ◽  
Author(s):  
J.-G. Uttecht ◽  
W. Preetz
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Hydrogen Bonds ◽  
Structure Determination ◽  
Complex Salt ◽  
Double Complex ◽  
Double Complex Salt ◽  
X Ray ◽  
Complex Anions

Abstract By treatment of [Pt(ox)2]2- with hydrogen peroxide the octahedral trans-[Pt(OH)2(ox)2]2- is formed. From the saturated aqueous solution in the presence of dipyridiniomethane dications single crystals of the double complex salt trans-(py2CH2)[Pt(OH)2(ox)2] trans-(py2CH2)[Pt(OH)(ox)2(H2O)]2 · 4H2O were grown and an X-ray structure determination (tricli­nic, space group P1̄, a = 8.649(1), b = 11.189(3), c = 12.731 (2) Å, α = 79.075(12), β = 80.725(8), γ= 73.932(13)°, Z = 1) has been performed. The centrosymmetric trans-[Pt(OH)2(ox)2]2- is connected via hydrogen bonds between its hydroxide groups and the aqua ligands of two protonated complex anions trans-[Pt(OH)(ox)2(H2O)]- .

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