Difluoro methane

Bis(trimethylsilyl)phosphines 1681, whose chemistry has been reviewed [5], condense with DMF and eliminate HMDSO 7 to give, e.g., the phosphaalkene 1682 [6]. Bis(trimethylsilyl)phosphines 1681 react with bis(dialkylamino)difluoro-methanes 1683 with elimination of Me3SiF 71 to give the phosphaalkenes 1684 [7, 8], whereas acid chlorides such as Me3CCOCl afford, with elimination of TCS 14, the O-trimethylsilylphosphaalkenes 1685 [9]. Bis(trimethylsilyl)phosphines 1681 condense with CO2 to the phosphacarbamates 1686 [10] whereas CS2 furnishes the methylenephosphanes 1687 [11, 12] (Scheme 11.1). 

We shall first consider how nonbonded interactions influence bond angles in molecules. Our approach will be illustrated by reference to the model systems difluoro-methane and 1,1-difluoroethylene. In these problems, we shall consider not only stabilizing orbital interactions but also overlap repulsion in order to demonstrate some interesting trends which obtain in these angle problems. 

Methane22 over cobalt(III) fluoride at 205L C gives fluoromethane (10.5%), difluoro-methane (27%), trifluoromethane (40%), and carbon tetrafluoride (8%). 

Phosphonate Diethyl Bromo-difluoro-methane ElOb,. 671 f-[CBr2F2 + (RO)3P]... 

ElectropMBc fluorinatian. Barton et al. have examined a number of fluoroxy reagents as electrophilic fluorinating agents, and conclude that bis(fluoroxy)difluoro-methane is as useful as fluoroxytrifluoromethane (2, 200 3, 146-147) and is potentially cheaper. 

Derivation Vapor-phase bromination of difluoro-methane. 

OICHLORO-METHANE CHLOROFLUORO-METHANE DIFLUORO-METHANE DIIODOMETHANE FORMALDEHYDE FORMIC-ACID BROMOMETHANE CHLOROMETHANE FLUOROMETHANE IODOMETHANE NITROMETHANE METHYL-NITRfTE METHYL-NITRATE METHANE METHANOL METHANETHIOL METHYLAMINE TETRA... 

Dichloro difluoro-methane Eskimon 12 Genetron 12 F-12 Halon 122 Freon 12... 

The ionization constants of diphosphonic acid derivatives of amino acids, ethane-1,2-diol, and fluoro- and difluoro-methane have been determined, as well as those of the amide (107) and the monoester (108). ... 

Mohanty, S. (2006). Estimation of vapor liquid equilibria for the system carbon dioxide-difluoro-methane using artificial neural networks. Int. J. Refrig. 29,243-249. 

Several different types of fluoroxy-compound have been shown to behave as electrophilic fluorinating agents, the best being bis(fluoroxy)difluoro-methane free radicals are not involved. Phenyltetrafluorophosphorane is recommended as a selective fluorinating agent for alcohols (Scheme 135). 

Oichloromonofluoro methane and monochloro-difluoro-methane 60 165 74 G E E hydrogen chloride 20% hydrogen fluoride 10% chiondonn 5% antimony pentachlonde. oxygen, nitrogen, total 5% (aH ap m .) wator not over 200 ppm... 

Moroni V., Macchi E., Giglioli G., Investigation on thermal stability and corrosion effects of dichloro-difluoro-methane in view of its possible application as working fluid in a power plant. La Termotecnica, vol. 28, 1974, p. 209-221. 

Freon 12B1 bromochloro- difluoro- methane 23 0-360 8 Resistant - slight changes in mass or dimensions no irreversible change Ultramid B BASF... 

CHF20CF20CHF2(bis(difluoromethoxy)(difluoro)methane), CHF20CF2CF20CHF2(l,2-bis(difluoromethoxy)-l,1,2,2-tetrafluoroethane), and CHF2OCF2CF2OCF2OCHF2 (l-(difluoromethoxy)-2-... 

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