ChemicalBook CAS DataBase List DIMETHYLDIFLUOROSILANE

DIMETHYLDIFLUOROSILANE synthesis

10synthesis methods

Product Name:DIMETHYLDIFLUOROSILANE
CAS Number:353-66-2
Molecular formula:C2H6F2Si
Molecular Weight:96.15

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Yield: 92%

Reaction Conditions:

with boron trifluoride diethyl etherate in neat (no solvent) at 20 - 120; for 3 h;Temperature;

Steps:

Procedure for the depolymerization of 1,1,3,3,5,5-hexamethylcyclotrisilazane 5
A ask was charged withcompound 5 (4.6 mmol) and boron triuoride diethyl etherate2 (3.0 equiv., 13.8 mmol, based on the subunit). A Vigreuxcolumn and a distillation head were connected. The mixturewas stirred and heated to 100°C (oil bath). The formed diuorodimethylsilane (bp = 16°C24) was continuously distilledo and collected. After 3 h the yield was determined and thequality was analyzed by NMR. Diuorodimethylsilane 5: 1HNMR: δ = 0.31 (t, 3JHF = 6.2 Hz) ppm. 13C{1H} NMR: δ =-3.45 (t, 2JCF = 16.7 Hz) ppm. 19F NMR: δ = -131.4 (sept, 3JHF= 6.2 Hz, 1JSiF = 289.9 Hz) ppm. 29Si{1H} NMR: δ = -2.4 ppm.Diethyl ether: 1H NMR: δ = 3.69 (q, 3JHH = 7.0 Hz, CH2), 1.26(t, 3JHH = 7.0 Hz, CH3) ppm. 13C{1H} NMR: δ = 67.0 (CH2),14.7 (CH3) ppm

References:

Döhlert, Peter;Pfrommer, Johannes;Enthaler, Stephan [Phosphorus, Sulfur and Silicon and the Related Elements,2016,vol. 191,# 9,p. 1189 - 1193]