M-Dodecyl MERCAPTAN

M-DODECYL MERCAPTAN, 21, 36 S-Dodecylthiuronium bromide, 21, 37 m-Dodecyl >-toluenesulfonate, 20, SO... 

SYNS l-DODECANETHIOL DODECYL MERCAPTAN (ACGIH) m-DODECYL MERCAPTAN 1-DODECYL MERCAPTAN m-LAURYL MERCAPTAN 1-MERCAPTODODECANE NCI-C60935 PENNFLOATM PENNFLOAT S... 

M-Dodecyl mercaptan has been prepared by the action of alkali on the salts of 5- -dodecyl thiourea and by reduction of di- -dodecyl disulfide. ... 

The thiol ( -dodecyl mercaptan) used ia this recipe played a prominent role ia the quaUty control of the product. Such thiols are known as chain-transfer agents and help control the molecular weight of the SBR by means of the foUowiag reaction where M = monomer, eg, butadiene or styrene R(M) = growing free-radical chain k = propagation-rate constant = transfer-rate constant and k = initiation-rate constant. 

Problem 6.22 Weighed amounts of styrene (M) and -butyl mercaptan (S) in sealed glass ampoules were heated at 60° C for different periods of time. The polymers were then precipitated in methanol, dried in oven, and degrees of polymerization evaluated by intrinsic viscosity measurements. From.the data given below calculate the chain transfer constant (Cs) for the st5Tene/dodecyl mercaptan system at 60°C. 

Beilstein Handbook Reference) AI3-07577 BRN 0969337 CCRIS 743 1-Dodecanethiol Dodecyl mercaptan 1-Dodecyl mercaptan EINECS 203-984-1 HSDB 1074 Lauryl mercaptan Lauryl mercaptide 1-Mercaptododecane NCI-C60935 NSC 814 Pennfloat M Pennfloat S. White soiid mp = -6.7° bpn 277°, bpi5 = 143° d O = 0.844 soluble in EtOH, Et20, CHCI3, insoluble in H2O. LD50 (rat orl) = 12800 mg/kg. 

DDM. See n-Dodecyl mercaptan 4,4 -Methylenedianiline Dichlorophene DDOA. See 6-Acetoxy-2,4-dimethyl-m-dioxane DDP. See Didecyl phthalate DDPM. See 4,4 -Methylenedianiline DDPS. See,4,4 -Diaminodiphenyl sulfone DDS. See 4,4 -Dichlorodiphenyl sulfone 4,4 -Diaminodiphenyl sulfone 2-Dodecen-1-ylsuccinic anhydride Dodecenyisuccinic anhydride... 

Aq.-alc. lead (II) acetate added dropwise to an ethanolic soln. of dodecyl mercaptan, triethylamine, and excess CSg, refluxed overnight didodecyl tri-thiocarbonate. Y 88%. Also isolation of intermediates s. M. Kiessel and D. Braun, B. 98, 1350 (1965). 

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