Anils glasses

Photo-properties op Anils in Solution in Rigid Glasses We have discovered that all anils of salicylaldehyde and of substituted salieylaldehydes are photo-colourable in solution in rigid glasses, whether or not they are so colourable in the crystalline state. The spectral changes involved appear to be identical for crystal and glassy solution. This proved true for a variety of solvents, both polar and non-polar, over wide ranges of temperature (—185° to —50°C) and concentration (5 x 10-8 to 1Q 8M)... 

Transparent anil opaque colors or enamels are used with equal effect upon a white and almost opaque ground, suck as porcelain. Transparent colors are rendered opaque, by the addition of oxide of tin and oxide of aino is used for enlivening tbo different tints, a proporty peculiar to the oxide of that metal, and the effect of which is greatly enhanced by tho fact that it imparts no color to the glass it also Improves the sulphur-yellow colors of the oxide of antimony. 

The material of construction for the Grignard reactors and feed vessels R-1. R-2, T-1, and T-2 is typiciilly stainless steel, carbon steel or glass-lined cat bon steel. (For convetiiencc the charge tanks anil the reactors are numbered in Figure 6.1. so that T-l refers to Tank I and R-l refers to Reactor I.) The use of carbon steel must be considered carefully, however, due to the potential introduction ol iron which can be a probletn in some reactions. The material of construction for R-3 and T-3, the quench equipment, can be glass-lined steel or an acid resistant metal alloy such as Hastelloy C. 

An ethereal soln. of allyl phenyl ether added dropwise during 45 min. to rapidly stirred Li-pieces in anhydrous tetrahydrofuran, ice-salt cooled to —10 to —20°, a pinch of biphenyl added if necessary to start the reaction, stirring continued 15 min. without cooling, separated from the Li by decantation and filtration through glass wool, a soln. of benzophenone anil in dry benzene added, and stirred 12 hrs. l-allyl-l,l-diphenylmethylaniline. Y 68%. Also allyltriphenylsilane s. J. J. Eisch and A. M. Jacobs, J. Org. Chem. 28, 2145 (1963) steric effect of the metal s. J. Yoshimura, Y. Ohgo, and T. Sato, Am. Soc. 86,3858 (1964). 

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