(4)
1. RSHL & A. E. Asato, "Photochemistry and Synthesis of Stereoisomers of Vitamin A," Tetrahedron, 40, 1931-1969 (1984).
2. S. Ganapathy & RSHL, "Polyenes 30. Quantum Chain Processes in Photoisomerization of the All-Trans, 7-Cis and 11-Cis Isomers of Retinal," J. Am. Chem. Soc., 114, 3459-3464 (1992).
3. S. Ganapathy & RSHL, "Polyenes 31. Photoisomerization of Sixteen Isomers of Retinal. Initial Product Distribution in Direct and Sensitized Irradiation," Photochem. Photobiol., 56, 959-964 (1992).
4. RSHL, "Photochemistry of Polyenes Related to Vitamin A," in "CRC Handbook of Organic Photochemistry and Photobiology," eds. W. M. Horspool & P. S. Song, CRC Press, 165-172, 1995.
5. R.-L. Chen & RSHL, "Vitamin A Isomers 20. New Hindered Isomers of 3-Dehydroretinal (Vitamin A2)," Tetrahedron, 52, 7809-7816 (1996).
6. J. Liu, RSHL & C. J. Simmons, "Synthesis and Properties of an Arylspiralene. A Cisoid Z,Z-1,4-Diphenyl-1,3-butadiene," Tetrahedron Lett., 38, 3999-4002 (1997).
7. L. U. Colmenares, X-L. Zou, J. Liu, A. E. Asato, RSHL, A. deLera & R. Alvarez, "11,12-Difluoro-rhodopsin and Related Odd-Numbered Fluororhodopsins. The Use of JF,F for Following a Cis-trans Isomerization Process," J. Am. Chem. Soc., 121, 5803-5804 (1999).
8. RSHL & G. S. Hammond, "The Case of Medium-Dependent Dual Mechanisms for Photoisomerization: One-Bond-Flip and Hula-Twist," Proc. Natl. Acad. Sci., USA, 97, 11153-11158 (2000).
9. RSHL, "Photoisomerization by Hula-Twist: A Fundamental Supramolecular Photochemical Reaction," Acc. Chem. Res., 34. 555-562 (2001).
10. RSHL & G. S. Hammond, "Examples of Hula-Twist in Photochemical cis,trans Isomerization," Chem., Euro. J., 7, 4536-4544 (2001).
11. RSHL & G. S. Hammond, "Hula-twist, a Photochemical Reaction Mechanism Involving Simultaneous Configurational and Conformational Isomerization"CRC Handbook of Organic Photochemistry and Photobiology, 2nd ed., ed. by Horspool, in press.
