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1,4-Dithiane

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Name

1,4-Dithiane

EINECS 208-007-2
CAS No. 505-29-3 Density 1.14 g/cm3
PSA 50.60000 LogP 1.46640
Solubility slightly soluble in water, soluble in hot ethanol and oil Melting Point 107-113 °C
Formula C4H8S2 Boiling Point 200.5 °C at 760 mmHg
Molecular Weight 120.24 Flash Point 82.1 °C
Transport Information N/A Appearance white solid with an extremely unpleasant smell
Safety 26-36 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 505-29-3 (1,4-Dithiane) Hazard Symbols IrritantXi
Synonyms

p-Dithiane(7CI,8CI);1,4-Dithiacyclohexane;1,4-Dithiin, tetrahydro-;NSC 24178;p-Dithiane;Diethylene disulfide;p-Dithiin, tetrahydro-;CCRIS 3240;HSDB 7426;

Article Data 73

1,4-Dithiane Synthetic route

540-63-6

ethane-1,2-dithiol

106-93-4

ethylene dibromide

505-29-3

1,4-Dithiane

Conditions
ConditionsYield
With 1-pentyl-3-methylimidazolium bromide at 60℃; for 5.5h;92%
With sodium ethanolate In ethanol for 2.5h; Cyclization; Heating;64%
540-63-6

ethane-1,2-dithiol

107-06-2

1,2-dichloro-ethane

505-29-3

1,4-Dithiane

Conditions
ConditionsYield
With 25percent soude; tetrabutylammomium bromide In benzene at 80℃; for 4h; Product distribution; other concentration of catalyst and soude, time;87.5%
With 1-pentyl-3-methylimidazolium bromide at 60℃; for 0.133333h; Irradiation; microwave;81%
With 1,8-diazabicyclo[5.4.0]undec-7-ene at 150℃; for 0.333333h; microwave irradiation;81%
25423-55-6

3,6-dithiaoctan-1,8-dithiol

3563-36-8

1,2-bis(2-chloroethylthio)ethane

A

505-29-3

1,4-Dithiane

B

296-41-3

1,4,7,10,13,16-hexathiacyclooctadecan

C

25423-56-7

1,4,7,10-tetrathiacyclododecane

Conditions
ConditionsYield
With caesium carbonate In N,N-dimethyl-formamide at 50℃;A n/a
B 70%
C 5%
16892-64-1

2,2,4,4,6,6-hexamethyl-1,3,5,2,4,6-trithiatristanninane

106-93-4

ethylene dibromide

A

505-29-3

1,4-Dithiane

B

dimethyltin dibromide 1,4-dithiane 2:1 complex

C

2767-47-7

dimethyltin dibromide

Conditions
ConditionsYield
In further solvent(s) soln. of (Me2SnS)3 in BrCH2CH2Br was heated at 140°C for 35 h; excess C2H4Br2 was removed in vac. at room temp., products were sepd. by sublimation at 70°C; dithiane was identified by chromy., elem. anal. for 2Me2SnBr2*S(CH2CH2)2S;A n/a
B 58%
C 18%
113322-95-5

{(C5H5)Ru(P(C6H5)3)2(SC2H4)}(1+)*CF3SO3(1-)*0.5CH2Cl2={(C5H5)Ru(P(C6H5)3)2(SC2H4)}(OSO2CF3)*0.5CH2Cl2

2001-45-8

tetraphenyl phosphonium chloride

A

505-29-3

1,4-Dithiane

B

32993-05-8

chloro(cyclopentadienyl)bis(triphenylphosphine)ruthenium (II)

Conditions
ConditionsYield
In dichloromethane-d2 byproducts: (C2H4S)n; PPh4Cl added to CD2Cl2-soln. of Ru-thiiran complex at 0°C; decompn. by warming to room temp.;A n/a
B 50%
50-00-0

formaldehyd

540-63-6

ethane-1,2-dithiol

A

4829-04-3

1,3-dithiolane

B

505-29-3

1,4-Dithiane

C

1449678-80-1

3-methylideneamino-1,5,3-dithiazepane

D

154729-78-9

1,3,6,8-tetrathiecane

Conditions
ConditionsYield
With hydrogenchloride; hydrazine hydrate In water at 20℃; pH=0.45 - 0.5;A 30%
B 9%
C 49%
D 12%
2040-67-7, 89124-15-2

trans-2,3-dichloro-1,4-dithiane

A

505-29-3

1,4-Dithiane

B

6784-47-0

2,2'-bi-1,3-dithiolanyl

C

23230-01-5

2,3-dihydro-1,4-dithiin

D

106691-43-4

2,3-dihydro-5,6-dichloro-1,4-dithiin

Conditions
ConditionsYield
With disodium 1,2-ethanedithiolate In ethanol for 12h;A 2%
B n/a
C 15%
D 6%
106-93-4

ethylene dibromide

A

420-12-2

thirane

B

505-29-3

1,4-Dithiane

Conditions
ConditionsYield
With aluminum oxide; sulfide ion In toluene at 140℃; for 20h;A 1.5%
B 1.8%
420-12-2

thirane

505-29-3

1,4-Dithiane

Conditions
ConditionsYield
With aluminum oxide; hydrogen sulfide at 220℃;
111-48-8

2,2'-thiobis-ethanol

A

15980-15-1

1,4-Oxathiane

B

505-29-3

1,4-Dithiane

Conditions
ConditionsYield
With potassium pyrosulfate at 160 - 210℃;
With aluminium silicate at 240℃;
With cation exchanger at 180℃;
With toluene-4-sulfonic acid; acetaldehyde; benzene Unter Entfernen des entstehenden Wassers und Erhitzen des Reaktionsprodukts auf 200grad;
at 180℃; in Gegenwart eines sauren Kationen-Austauschers;

1,4-Dithiane Consensus Reports

Reported in EPA TSCA Inventory.

1,4-Dithiane Specification

The 1,4-Dithiane with CAS registry number of 505-29-3 is also known as p-Dithiane(7CI,8CI). The IUPAC name and product name are the same. It belongs to product categories of Alphabetical Listings; C-D; Flavors and Fragrances; Heterocyclic Building Blocks; S-Containing. Its EINECS registry number is 208-007-2. In addition, the formula is C4H8S2 and the molecular weight is 120.24. This chemical is a white solid with an extremely unpleasant smell.

Physical properties about 1,4-Dithiane are: (1)ACD/LogP: 1.12; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.12; (4)ACD/LogD (pH 7.4): 1.12; (5)ACD/BCF (pH 5.5): 4.2; (6)ACD/BCF (pH 7.4): 4.2; (7)ACD/KOC (pH 5.5): 97.25; (8)ACD/KOC (pH 7.4): 97.25; (9)#H bond acceptors: 0; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 50.6Å2; (13)Index of Refraction: 1.573; (14)Molar Refractivity: 34.77 cm3; (15)Molar Volume: 105.4 cm3; (16)Polarizability: 13.78×10-24cm3; (17)Surface Tension: 43.8 dyne/cm; (18)Density: 1.14 g/cm3; (19)Flash Point: 82.1 °C; (20)Enthalpy of Vaporization: 41.88 kJ/mol; (21)Boiling Point: 200.5 °C at 760 mmHg; (22)Vapour Pressure: 0.459 mmHg at 25 °C

Preparation of 1,4-Dithiane: it is prepared by reaction of ethane-1,2-dithiol with 1,2-dibromo-ethane. The cyclization reaction needs reagent sodium ethoxide and solvent ethanol with other condition of heating for 2.5 hours. The yield is about 64%.

1,4-Dithiane is prepared by reaction of ethane-1,2-dithiol with 1,2-dibromo-ethane.

Uses of 1,4-Dithiane: it is used to produce [1,4]dithiane-1-oxide. The reaction occurs with reagent m-chloroperbenzoic acid. The yield is about 36%.

1,4-Dithiane is used to produce [1,4]dithiane-1-oxide.

When you are using this chemical, please be cautious about it. As a chemical, it is irritating to eyes, respiratory system and skin. During using it, wear suitable protective clothing. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
1. SMILES: S1CCSCC1
2. InChI: InChI=1/C4H8S2/c1-2-6-4-3-5-1/h1-4H2
3. InChIKey: LOZWAPSEEHRYPG-UHFFFAOYAR
4. Std. InChI: InChI=1S/C4H8S2/c1-2-6-4-3-5-1/h1-4H2
5. Std. InChIKey: LOZWAPSEEHRYPG-UHFFFAOYSA-N

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral 2768mg/kg (2768mg/kg) BEHAVIORAL: TREMOR

BEHAVIORAL: ATAXIA

LUNGS, THORAX, OR RESPIRATION: DYSPNEA
National Technical Information Service. Vol. AD-A172-647,

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