Reaction of dehydrodithizone with tetraphenylcyclopentadienone. X-Ray crystal structures of a stable 1,5-dipole, azobenzene N-(cis-3a,6a-dihydro-4-oxo-3a,5,6,6a-tetraphenyl-4H-cyclopentathiazol-2-yl)-imide, and of cis-3a,6a-dihydro-3a,5,6,6a-tetraphenyl-2-phenylazo-4H-cyclopentathiazol-4-one

Abstract

The title compounds (5) and (8) were obtained from the reaction of dehydrodithizone with tetraphenylcyclopentadienone and their structures were determined by single-crystal X-ray analysis by direct methods. Crystals of both compounds are triclinic, with Z= 8 in unit cells of dimensions: (5)a= 19.933(6), b= 9.755 (3), c= 36.515-(12)Å; α= 87.429(8), β= 102.659(6), γ= 99.675(4)°; (8)a= 14.855(2), b= 19.816(3), c= 19.335(3), α= 94.260(6), β= 90.815(6), γ= 93.041(8)°. The structures were refined to R 0.046 [(5) 2 808 observed reflections] and 0.040 [(8) 2 380 observed reflections].