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CAS No.: | 10544-50-0 |
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Name: | Cyclic octaatomic sulfur |
Article Data: | 202 |
Molecular Structure: | |
Formula: | S8 |
Molecular Weight: | 256.528 |
Synonyms: | Cyclicoctaatomic sulfur; Cyclo-S8; Cyclooctasulfane; Cyclooctasulfur; NSC 603623;Octasulfur; Orthorhombic sulfur; S8; Sulfur (S8); Sulfur molecule (S8); Sulfuroctaatomic molecule |
Density: | 1.862g/cm3 |
Boiling Point: | °Cat760mmHg |
Flash Point: | °C |
PSA: | 202.40000 |
LogP: | 5.18560 |
Conditions | Yield |
---|---|
decompn. under argon at about 800 K; | A 100% B 100% C 100% |
A
sulfur
Conditions | Yield |
---|---|
In chlorobenzene at 132℃; for 1h; Solvent; Reagent/catalyst; Inert atmosphere; | A 100% B 96% |
Conditions | Yield |
---|---|
With air; iron(III) chloride In water H2S and air were bubbled into soln. FeCl3 in N-methylpyrrolidinone-H2O (95:5) at room temp. for 300 h; | A 98.72% B 0.09% C 0.02% |
With air; Iron(III) nitrate nonahydrate In water H2S and air were bubbled into soln. Fe(NO3)3*9H2O in N-methylpyrrolidinone-H2O (95:5) at room temp. for 24 h; | A 63.03% B n/a C n/a |
With air; iron(III) chloride In further solvent(s) H2S and air were bubbled into soln. FeCl3 in N-methylpyrrolidinone at room temp. for 100-313 h; sulfur was filtered off; | |
With air; iron(III) chloride hexahydrate In water H2S and air were bubbled into soln. FeCl3*6H2O in N-methylpyrrolidinone-H2O (95:5) at room temp. for 198 h; | |
With air; iron(III) chloride In water H2S and air were bubbled into soln. FeCl3 in N-methylpyrrolidinone-H2O (95:5) at room temp. for 300 h; |
dibenzylamine
A
sulfur
Conditions | Yield |
---|---|
In dichloromethane for 7h; Reflux; | A 98% B 82% |
A
sulfur
Conditions | Yield |
---|---|
at 230℃; for 0.166667h; Reagent/catalyst; Solvent; Inert atmosphere; | A 97% B 65% |
A
sulfur
B
1,4-bis(trimethylsilyl)-2,3,6,7-tetrathiacyclooctane
D
ethenyltrimethylsilane
Conditions | Yield |
---|---|
In benzene byproducts: Cu2Cl2, CO; 80°C, 8 h; filtn., washing ppt. (hot benzene), chromy. of filtrate after removing solvent; | A 90% B 10% C n/a D 96% |
Conditions | Yield |
---|---|
With (NH4)2S(x) In tetrahydrofuran; methanol addn. of a soln. of (NH4)2S(x) in methanol to a soln. of (C5Me5)ReOCl2 in THF and stirring for 4 h; removal of the solvent and chromatography of the residue on silica gel, elution of S8 with toluene/hexane and elution of (C5Me5)ReS3S4 with CH2Cl2, recrystn. from CHCl3/hexane at -25°C; | A n/a B 95.8% |
Conditions | Yield |
---|---|
In dichloromethane for 0.166667h; Solvent; Temperature; Time; Reflux; | A 95% B 78% C 14% D 6% |
Conditions | Yield |
---|---|
In dichloromethane for 3.5h; Time; Reflux; | A 94% B 74% C 11% D 10% |
N-butylamine
A
sulfur
Conditions | Yield |
---|---|
In dichloromethane for 4h; Reflux; | A 94% B 32% |