Propane-2-thiol

In recent work the additional conformers arising from the —SH rotation were taken into account and the treatment of the —SH torsion was transferred from ethanethiol. That is, the energy of the trans orientation of the C—C—SH chain was taken as 1.3 kJ mol higher than that of the gauche orientation. The rotation of the CHg—CHg frame is now known from microwave spectroscopy to be complex in n-propyl fluoride and n-propyl chloride, so the treatment as a simple 3-fold cosine barrier was replaced by one as an anharmonic oscillator with a single average wavenumber v and average anharmonicity coefficient X (cf. p. 292). 

A similar treatment of the torsion of other groups (e.g. of one methyl group in butane-2-thiol, both methyl groups in 2-methylpropane-l-thiol, and of the ethyl group in 2-methylbutane-2-thiol) as anharmonic oscillators has been adopted in recent work.  

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Chemical Designations - Synonyms 1-Propanethiol Propane-1-thiol Chemical Formula CH CHjCH SH. 

Propanethiol Propane-1-Thiol Propane-2-Thiol 1,2,3-Propanetriol Propanoic Acid Propanoic Anhydride... 

Dissolve lg (0.005 mol) of l-chloro-2,4-dinitrobenzene in 5 ml of rectified spirit with warming and add a solution of 0.5 ml (0.005 mol) of 2-methyl-propane-1-thiol in 5 ml of rectified spirit containing 2 ml of 10 per cent aqueous sodium hydroxide. Heat under reflux for 10 minutes and decant the hot solution from any insoluble material into a clean conical flask. Allow the solution to cool, filter and recrystallise the sulphide twice from methanol. The product is obtained as yellow flakes, m.p. 75-76 °C the yield is 440 mg (35%). 

In the field of thiochemistry, the photocatalytic synthesis of mercaptans represents an interesting chemical route. Schoumacker et al. [60] performed the synthesis of propan-1-thiol by addition of H2S on propene in contact with illuminated Ti02 or CdS catalysts, according to a reaction mechanism implying photogenerated SH radicals. 

Alkyl sulfides and thiols. Some alkyl thiols and sulfides, notably those from commonly ingested Allium sativum (garlic) and Allium cepa (onion) (Alliaceae), are variously bioactive as odorants and antimicrobials. Propanethial S-oxide (CH3-CH2-CH=S=0) is a lachrymatory irritant principle of onion. Allicin (S-oxodiallydisulfide CH2=CH—CH2-SO-S-CH2— CH=CH2), diallyldisulfide (CH2=CH-CH2-S-S-CH2-CH=CH2) and diallylsulfide (CH2=CH—CH2—S—CH2-CH=CH2) are major odorants of garlic that are reactive and irritant because of the allyl groups. Dimethyl disulfide (CH3—S—S-CH3), dipropyl disulfide (CH3-CH2-CH2-S-S-CH2-CH2-CH3), methyl allyl disulfide (CH3-S-S-CH2-CH=CH2) and propane-1-thiol (CH3-CH2—CH2—SH) are further Allium odorants. Methane thiol (methyl mercaptan CH3—SH) is a widespread plant volatile and notably derives from anaerobic bacterial degradation of cysteine as in human flatus and bad mouth odour. The aliphatic disulfides allicin and ajoene inhibit proinflammatory expression of iNOS. 

Bauer and Hirsch (764) found that 2,5-dimethylpyrazine 1-oxide refiuxed for 2 hours with propane-1-thiol in acetic anhydride gave 2,5-dimethyl-3-propylthio-pyrazine (5), and 2,5-dimethylpyrazine 1,4-dioxide similarly treated gave 2,5-dimethyl-3,6-dipropylthiopyrazine, but attempted reactions with benzenesulfonyl chloride instead of acetic anhydride (as in the pyridine series) were unsuccessful. 

Q.4) 1-PropanethioI, propane-1-thiol, n-propyl mercaptan [107-03-9] FEMA 3521... 

PROPANE-1-THIOL (107-03-9) Forms explosive mixture with air (flash point —4°F/—20°C). May react with water, steam, or acids to produce toxic and flammable vapors. Violent reaction, ignition, or explosion with strong oxidizers, calcium hypochlorite, strong acids, alkalis, alkali metals. Incompatible with aliphatic amines, ethylene oxide, isocyanates, nitric acid, sulfuric acid. Attacks some forms of plastics, coatings, and rubber. Flow or agitation of substance may generate electrostatic charges due to low conductivity. 

Propanethiol Propane-1-thiol Propyl mercaptan n-Propylmercaptan Propylthiol n-Propylthiol Thiopropyl alcohol n-Thiopropyl alcohol. Unpleasant stench Oder, Used as a leak detecting additive to natural gas and as a chemical intermediate and herbicide. Uquid mp = -113.3 bp = 67.8 p2° = 0.8411 Tun = 240 nm slightly soluble in H2O, soluble in EtOH, EtaO, MeaCO, CeHe. Elf Atochem N. Am. Phillips 66. 

Synonyms/Trade Names 3-Mercaptopropane, Propane-1-thiol, Propyl mercaptan, n-Propyl mercaptan ... 

Synonyms Isobutanethiol Isobutyl mercaptan Isobutyl thiocalcohol 2-Methylpropanethiol 2-Methyl propane-1-thiol... 

Synonyms Mercaptan C3 3-Mercaptopropanol 1-Propanethiol Propane-1-thiol 1-Propyl mercaptan... 

C3H8S 107-03-9 Propane- 1-thiol syn. nPropyl mercaptan 1-Propanethiol... 

Components 1. C3HgS, Propane-1-thiol [107-03-9] 2. C4H10, Butane [106-97-8]... 

Propane-1-thiol 3-Mercapto- 2-Acetylamino-3 2,3-Dimercapto- Naphthalene-... 

The use of azobisisobutyrylonitrile and benzoyl peroxide as initiators for the grafting of vinyl acetate on to cellulose has been compared. The chain-transfer mechanism occurring in these systems has been verified by carrying out grafting experiments in the presence of the chain-transfer agent propane-1-thiol. 

Many applications of Kilpatrick and Pitzer s procedure for calculating thermodynamic properties of molecules with compound rotation have been reported. In all cases possible potential energy cross-terms between rotating tops have been neglected. Contributions from internal rotation of symmetric tops have been calculated using the appropriate tables." These tables have also been used in calculations for the internal rotation of asymmetric tops hindered by a simple -fold cosine potential. 3-Fold potential barriers have been assumed in calculations for the —OH rotations in propanol and 1-methylpropanol, the —SH rotations in propane-1-thiol, butane-2-thiol, 2-methylpropane-l-thiol, and 2-methylbutane-2-thiol, the C—S skeletal rotations in ethyl methyl sulphide, diethyl sulphide, isopropyl methyl sulphide, and t-butyl methyl sulphide, and the C—C skeletal rotations in 2,3-dimethylbutane, and 2-methylpropane-l-thiol. 2-Fold cosine potential barriers have been assumed in calculations in the S—S skeletal rotations in dimethyl disulphide and diethyl disulphide. ... 

Formula CsHgS Name Propane-1-thiol CAS 107-03-9 Mol. Weight 76.160620000... 

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