The crystal and molecular structures of two photodimers from N-chloroacetyltyramine

Ultraviolet irradiation of N-chloroacetyltyramine eliminates HC1 and produces two unusual photodimers (I) and (II) whose molecular formulas have been identified by X-ray structure analyses. The N,N'-dimethyl derivative of (I), decahydro-7,14a,7a, 14-ethanediylidenenaphtho[ 1,8-de: 4,5-d'e'] bisazocine-4,6,11,13(1H,7H,8H, 14H)-tetrone (C2zH26NaO4.2HzO), crystallizes in space group P2,/c, with a= 12.793 (3), b= 12.879 (3), c= 13.822 (4)/~, and fl= 120.03 (2) °, with four molecules per unit cell. The N,N'-diacetyl derivative of (IlL 4,11-diacetyldodecahydro-7H-1,7,8a-ethanylylidene-8,14-methanocyclopropa[l,6]benzo[l,2-d: 4,3-d']bisazocine-3,12,15,17(4H, 9H)-tetrone (C24H26N206), crystallizes in space group Pbca, with a= 24.927 (7), b= 12.971 (4), c= 12.437 (4) ]~, and eight molecules in the unit cell. Data for both compounds were collected on an automatic four-circle diffractometer using the 0-20 scan technique. The final agreement indices for the two compounds, at the conclusion of full-matrix anisotropic refinement, were 0.076 and 0.052, respectively.