22577-86-2Relevant academic research and scientific papers
MoF6 and WF6: Nonrigid molecules?
Quinones, Gustavo Santiso,Haegele, Gerhard,Seppelt, Konrad
, p. 4755 - 4762 (2004)
Calculations reveal that the octahedral-trigonal prismatic-octahedral rearrangement has particularly low-energy barriers for MoF6, WF 6, and (hypothetical) CrF6. Experimental evidence is obtained from the dynamic 19/
Method of making chlorofluoroethers
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Example 4, (2010/01/31)
A method is provided for preparation of chlorofluoroethers ClCF2CFClOR8f and Cl2CFCFClOR8f by direct fluorination of Cl2CHCH2OR8 and Cl3CCH2OR8, respectively, wherein R8 is a C1-C20 alkyl-or acyl-containing group optionally up to 5 ether oxygen atoms and optionally substituted by functional groups and R81, is the corresponding perfluoroalkyl or perfluoracyl-containing group.
Synthesis and characterization of new alkoxide and aryloxide derivatives of titanium and zirconium. X-ray molecular structure of
Amor, J. I.,Burton, N.C.,Cuenca, T.,Gomez-Sal, P.,Royo, P.
, p. 153 - 160 (2007/10/02)
Lithium or sodium alkoxides MOR (R = CH2CH-CMe2; M = Li 1; Na 2; R = C6F5; M = Li 3) were prepared by reaction of the alcohols with n-butyl lithium or sodium metal in hexane.Reaction of a hexane suspension of 3 with SiClMe3 afforded SiMe3(OC6F5) 4, whereas the reaction of 3 equivalents of C6F5OH with AlMe3 in hexane led to Al(OC6F5)3 5.Compounds 1 or 2 react with one equivalent of *Cl2Me> (Cp* = C5Me5) in toluene to give *ClMe(OCH2CH=CMe2)> 6.Complex 6 reacts with AlEtCl2 to give quantitatively *Cl3>.In the presence of water, the hydrolysis of 6 takes place giving the μ-oxo compound *Cl)(μ-O)>3>. *Cl2Me> reacted with an excess of the alcohol C6F5OH to give *(OC6F5)3> 7. reacted with two equivalents of pentafluorophenol in the presence of aniline to give the dialkoxide 8.When the same reaction was carried out in a 1:1 molar ratio, a mixture of 8 and the chloroalkoxide 9 was obtained.A clean reaction takes place when the μ-oxo compound is treated with two equivalents of pentafluorophenol, leading to the isolation of the alkoxo complex 2(μ-O)> 10.The methylalkoxo derivative 11, was obtained by reaction of with one equivalent of 3.Alternative methods can also be followed to synthesize 8 and 11.The crystal and molecular structure of 8 has been determined by X-ray diffraction methods.The most interesting feature of this structure is the disposition of the (C6F5) ring planes, which are located practically on the reflection plane defined by O(1), Zr(1) and O(1)'. Keywords: Titanium; Zirconium; Alkoxides; X-ray diffraction; Group 4; Cyclopentadienyl
Method of preparing trialkyl organo-oxysilanes
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, (2008/06/13)
A method for the continuous or batch preparation of trialkyl organo-oxysilanes by reaction of organic hydroxy compounds with trialkyl halogen silanes in the absence of acid-binding substances is disclosed. The organic hydroxy compound is added directly to the trialkoxy halogen silane in an amount which corresponds to no more than the stoichiometrically necessary amount. The trialkyl halogen silane, or the resultant mixture is always at the boiling temperature or above the boiling temperature in the gaseous state. The reaction mixture is subjected, no later than toward the end of the reaction, to a column distillation in which the column temperature is held such that the reaction is carried to the end within the column. In continuous operation, the trialkyl halogen silane is introduced in gaseous form into the bottom of a column and either kept under reflux or introduced into a reactor into which corresponding stoichiometric amounts of organic hydroxy compound are simultaneously introduced. In the column, either a raw product or freshly introduced organic hydroxy compound in liquid form flows against the gaseous trialkyl halogen silane, and the desired trailkyl organo-oxysilane collects at ebullition on the floor of the column and is continuously removed.
Phosphorus-fluorine chemistry. XXVII. Aryloxy-substituted fluorophosphoranes
Peake, Stephen C.,Fild, Manfred,Hewson, Michael J. C.,Schmutzler, Reinhard
, p. 2723 - 2727 (2007/10/06)
The silyl ethers C6H5OSi(CH3)3 and C6F5OSi(CH3)3 undergo silicon-oxygen bond cleavage reactions with fluorophosphoranes, RnPF5-n (n = 0, 1, 2; R = CH3, C6H5, (CH3)2N in the case of C6H5OSi(CH3)3; n = 0, 1, 2; R = CH3, C6H5 in the case of C6F5OSi(CH3)3), to give a series of thermally stable compounds of the types (C6H5O)3-nPRnF2 and (C6F5O)3-nPRnF2 (n = 0, 1, 2). The intermediate (RO)2PF3, assumed in the reactions of PF5 with ArOSi(CH3)3, was isolated only in the form of the isomeric stable phosphonium salt [(RO)4P] [PF6]. The 31P and 19F nmr spectra of the new compounds are reported and discussed in terms of the structures of the molecules.
