N -Butyl stearate

Successful results have been obtained (Renfrow and Chaney, 1946) with ethyl formate methyl, ethyl, n-propyl, iso-propyl, n-butyl, i o-butyl, sec.-butyl and iso-amyl acetates ethylenegl3rcol diacetate ethyl monochloro- and trichloro-scetates methyl, n-propyl, n-octyl and n-dodecyl propionates ethyl butyrate n-butyl and n-amyl valerates ethyl laurate ethyl lactate ethyl acetoacetate diethyl carbonate dimethyl and diethyl oxalates diethyl malonate diethyi adipate di-n-butyl tartrate ethyl phenylacetate methyl and ethyl benzoates methyl and ethyl salicylates diethyl and di-n-butyl phthalates. The method fails for vinyl acetate, tert.-butyl acetate, n-octadecyl propionate, ethyl and n-butyl stearate, phenyl, benzyl- and g aicol-acetate, methyl and ethyl cinnamate, diethyl sulphate and ethyl p-aminobenzoate. 

BUTYL-HEXADECYL-SULFIDE DECYL-SULFIDE ETHYL-OCTADECYL-SULFIDE HEPTADECYL-PROPYL-SULFIDE HETHYL-NONADECYL-SULFIDE 1-EICOSANETHIOL DECYL-DISULFIDE TRI-o-CRESYL PHOSPHATE 1-PHENYLPENTADECANE 1-CYCLOPENTYLHEXADECANE 1-CYCLOHEXYLPENTADECANE 1-PHENYLHEXADECANE 1-CYCLOHEXYLHEXADECANE n-BUTYL STEARATE DIISOOCTYL PHTHALATE DIOCTYL PHTHALATE DINONYLPHENOL TETRAPHENYLETHYLENE DIISODECYL PHTHALATE... 

N-Butyl stearate 191 FALSE FALSE FALSE FALSE... 

Thermotropic Liquid Crystalline and Solid Matrices. A related thermotropic liquid-crystalline medium, the hexatic B (meso)phase of n-butyl stearate (BS) [316], consists of layers like those of the gel phases with the exception that the head group of each molecule is a carbobutoxy group instead of a carboxylate anion and the hydrophobic layers are in a continuous assembly (Figure 16). The solid phases of BS are also packed in layers with individual molecules in extended conformations and normal to the layer planes. The orthorhombic (instead of hexagonal) arrangement in the solid is related to the inability of individual molecules to rotate about their long axes. 

Figure 60. Temperature dependence on the ratio of elimination to cyclization products for photolysis of ketones 97 (n = 10) (O) and 97 (n = 19) (A) in n-butyl stearate.

Another illustrative example is the photodrmerization of -octadecyl trans-cinnamate, which has been studied in the isotropic, smectic, and crystalline phases of n-butyl stearate, BS [731] cf. Eq. (5-165). 

C22H4402 n-BUTYL STEARATE exper i mental/est i mate estimate... 

The number of commercially available liquid crystals that exhibit smectic and/or nematic phases at or close to room temperature, are optically transparent above 250 nm, that make relatively poor triplet quenchers, and whose structures have been reasonably well-characterized is relatively small. Two liquid crystals that do satisfy these requirements - n-butyl stearate (BS) and tranj,frflni-4 -butylbicyclohexyl-4-carbonitrile (CCH-4) - have been investigated fairly extensively using ketone photochemistry (23,27-34) and it is appropriate to provide some description of their structures before proceeding further. The smectic phases of both of these compounds have been characterized by x-ray diffraction (35-36) and other methods (37-39). 

Figure 2. F/C ratios versus temperature for photolysis of lb ( ) and Id ( ) in the solid (K), Sm-B (S), and isotropic (I) phases of n-butyl stearate. Arrows show the phase transition temperatures (Data from ref. 29).

Figure 3. Dependence of Norrish II F/C ratios on ketone chain length for photolysis of 2 (a) and 3 (b) in the Sm-B phase of n-butyl stearate (data from ref. 27b).

C22H4402 n-BUTYL STEARATE -69.046 2.5211E+00 -2.0966E-03 1.0835E-06 -2.7531E-10 298 1200... 

Beilstein Handbook Reference) ADK STAB LS-8 AI300398 APEX 4 BRN 1792866 BS Butyl octadecanoate n-Butyl octadecanoate Butyl octadecylate Butyl stearate n-Butyl stearate EINECS 204-666-5 Emerest 2325 Estrex IB 54, IB 55 ... 

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