A NOVEL BIS-TETRAHYDRONAPHTHYL THIOSEMICARBAZONE

In an attempt to produce 2-methylene-1-tetralone thiosemicarbazone, th e reaction of 2-methylene-1-tetralone with thiosemicarbazide in ethano l containing catalytic quantities of acetic acid afforded the title co mpound, 2-[2-(2-hydroxy-1-oxo- 1,2,3,4-tetrahydro-2-naphthyl)ethyl]- 1 ,2,3,4-tetrahydronaphthalen-1-one 1-thiosemicarbazone, C23H25N3O2S, wh ose structure is reported here. The configuration of the carbimino gro up is E and the bond lengths in the thiosemicarbazono groups indicate delocalization of the electrons of the N atoms. The planes of the aryl groups are approximately parallel to each other. One of the two cyclo hexenone rings is in a twist-chair conformation and the other is in a twist-boat conformation.