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CAS No.: | 541-01-5 |
---|---|
Name: | hexadecamethylheptasiloxane |
Article Data: | 14 |
Molecular Structure: | |
Formula: | C16H48O6Si7 |
Molecular Weight: | 533.152 |
Synonyms: | Pentameres Dimethylsiloxan;Heptasiloxane, hexadecamethyl-;EINECS 208-763-3;Hexadecamethyl-heptasiloxan;Heptasiloxane,1,1,1,3,3,5,5,7,7,9,9,11,11,13,13,13-hexadecamethyl;Hexadekamethylheptasiloxan;hexadecamethylpentasiloxane;hexadecamethyl-heptasiloxane;Heptasiloxane,hexadecamethyl; |
Density: | 0.917g/cm3 |
Melting Point: | -78°C |
Boiling Point: | 270°Cat760mmHg |
Flash Point: | 168.9°C |
PSA: | 55.38000 |
LogP: | 6.26480 |
1,1,1,3,3-pentamethyl-3-acetoxydisiloxane
hexadecamethylheptasiloxane
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 25℃; | 95% |
triethylamine In dichloromethane at 29℃; Rate constant; Mechanism; | 95% |
octamethylcyclotetrasiloxane
A
tetramethylsilane
B
trimethylsilyl iodide
C
Hexamethyldisiloxane
D
hexadecamethylheptasiloxane
Conditions | Yield |
---|---|
With gallium(III) iodide at 140 - 170℃; for 5h; Yield given; Title compound not separated from byproducts; | A 61% B n/a C n/a D n/a |
1,1,1,3,3-pentamethyl-3-acetoxydisiloxane
A
docosamethyl-decasiloxane
B
hexadecamethylheptasiloxane
Conditions | Yield |
---|---|
With trifluorormethanesulfonic acid In dichloromethane at 25℃; | A 32% B 35.5% |
With trifluorormethanesulfonic acid In dichloromethane Mechanism; Ambient temperature; | A 32% B 35.5% |
Conditions | Yield |
---|---|
With sulfuric acid |
ethyl trimethylsilyl ether
diethoxy dimethylsilane
A
hexadecamethylheptasiloxane
Conditions | Yield |
---|---|
With hydrogenchloride | |
With sodium hydroxide | |
With hydrogenchloride | |
With sodium hydroxide |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 90 percent / 5 h 2: 35.5 percent / CF3SO3H / CH2Cl2 / Ambient temperature View Scheme | |
Multi-step reaction with 2 steps 1: 90 percent / 5 h 2: 95 percent / Et3N / CH2Cl2 / 29 °C View Scheme |
ethyl trimethylsilyl ether
diethoxy dimethylsilane
A
Octamethyltrisiloxane
B
decamethyltetrasiloxane
C
dodecamethylpentasiloxane
D
tetradecamethylhexasiloxane
E
hexadecamethylheptasiloxane
Conditions | Yield |
---|---|
With NaOH In water byproducts: C2H5OH; heating of (CH3)2Si(OC2H5)2, (CH3)3Si(OC2H5) and an excess (50%) of H2O in presence of NaOH; sepn. of C2H5OH by distn.; boiling of the residue with 20% aq. HCl; further products;; distn.;; |
Hexamethyldisiloxane
octamethylcyclotetrasiloxane
A
Octamethyltrisiloxane
B
decamethyltetrasiloxane
C
dodecamethylpentasiloxane
D
tetradecamethylhexasiloxane
E
hexadecamethylheptasiloxane
Conditions | Yield |
---|---|
With sulfuric acid; antimony(V) chloride In tetrachloromethane; sulfuric acid shaking of (CH3)3SiOSi(CH3)3 and ((CH3)2SiO)4 (1:1 mol) with concd. H2SO4 at 25°C for 8 days; equilibrium react.; further products;; | |
With sulfuric acid In sulfuric acid shaking of (CH3)3SiOSi(CH3)3 and ((CH3)2SiO)4 (1:1 mol) with concd. H2SO4 at room temp. for 5 h; equilibrium react.; further products;; | |
With H2SO4 In sulfuric acid aq. H2SO4; shaking of (CH3)3SiOSi(CH3)3 and ((CH3)2SiO)4 (1:1 mol) with concd. H2SO4 at room temp. for 5 h; equilibrium react.; further products;; | |
With H2SO4; antimony(V) chloride In tetrachloromethane; sulfuric acid aq. H2SO4; shaking of (CH3)3SiOSi(CH3)3 and ((CH3)2SiO)4 (1:1 mol) with concd. H2SO4 at 25°C for 8 days; equilibrium react.; further products;; |