Saltiel

Saltiel J and Sun Y-P 1989 Intrinsic potential energy barrier for twisting in the f/ a/rs-stilbene SI State in hydrocarbon solvents J. Phys. Chem. 93 6246-50... 

Sun Y-P and Saltiel J 1989 Application of the Kramers equation to stiibene photoisomerization in / -alkanes using translational diffusion coefficients to define microviscosity J. Phys. Chem. 93 8310-16... 

Anthracene has also been crystd from EtOH, chromatographed through alumina in hot benzene (fume hood) and then vac sublimed in a pyrex tube that has been cleaned and baked at 100°. (For further details see Craig and Rajikan J Chem Soc, Faraday Trans 1 74 292 1978 and Williams and Zboinski J Chem Soc, Faraday Trans 1 74 611 1978.) It has been chromatographed on alumina, recrystd from n-hexane and sublimed under reduced pressure. [Saltiel J Am Chem Soc 108 2674 1986 Masnori et al. J Am Chem Soc 108 1126 1986.] Alternatively, it was recrystd from cyclohexane, chromatographed on alumina with n-hexane as eluent, and recrystd two more times [Saltiel et al. J Am Chem Soc 109 1209 1987]. 

Fluorenone [486-25-9] M 180.2, m 82.5-83.0", 85-86", b 341°/760inin. Crystd from absolute EtOH, MeOH or benzene/pentane. [Ikezawa J Am Chem Soc 108 1589 1986.] Also twice recrystd from toluene and sublimed in a vac [Saltiel J Am Chem Soc 108 2674 1986]. Can be distd under high vacuum. 

Phthalic anhydride [85-44-9] M 148.1, m 132°, b 295°. Distd under reduced pressure. Purified from the acid by extracting with hot CHCI3, filtering and evaporating. The residue was crystd from CHCI3, CCI4 or benzene, or sublimed. Fractionally crystd from its melt. Dried under vacuum at 100°. [Saltiel 7 Am Chem Soc 108 2674 1986.]... 

Xanthenone (xanthone) [90-47-1] M 196.2, m 175.6-175.4 . Crystd from EtOH (25mL/g) and dried at 100°. It has also been recrystd from n-hexane three times and sublimed in vacuo. [Saltiel 5 Am Chem Soc 108 2674 7986]. 

Ferrocene [102-54-5] M 186.0, m 173-174°. Purified by crystn from pentane or cyclohexane (also C6H6 or MeOH can be used). Moderately soluble in Et20. Sublimes readily above 100°. Crystallisation from EtOH gave m 172.5-173°. [Org Synth Coll Vol IV 473 1963 J Chem Soc 632 1952.] Also crystd from methanol and sublimed in vacuo. [Saltiel et al. J Am Chem Soc 109 1209 1987.]... 

The mechanism for the direct photochemical cis-trans isomerization of stilbene has been a highly controversial subject. However, a recent review by Saltiel and co-workers greatly helps to clarify this area of research by painting a detailed and beautifully consistent picture. We will make extensive reference to this review.U)... 

Any mechanism which involves isoenergetic, radiationless internal conversion from C, P, or T to a high vibrational level of the ground state would be expected to show a large deuterium isotope effect on the rate of internal conversion. In the direct photolysis of perdeuterio and perhydrostilbene, Saltiel<8a) found no isotope effect on the photostationary state or upon the quantum yields of cis-to-trans and trans-to-cis conversion. 

Saltiel(1) has pointed out that the experimental study of Lewis, Dalton, and... 

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