CRYSTAL GROWTH AND STRUCTURE OF 3-ACETAMIDO-4-N-CYCLOOCTYLAMINO -NITROBENZENE, A NEW ORGANIC MATERIAL FOR NONLINEAR OPTICS. ^a)Ruiz-Perez C., Gonz.lez-Platas, J., Yanes, A.C., Torres, M.E. (Dpto. Fisica Fundamental y Experimental, Universidad de La Laguna, Spain) ^b)Solans, X.(Dpto. Cristal.logafia, Mineralogia y Deposits Minerals Universitat de Barcelona. Spain).

Nonlinear optical crystals appear very attractive for applications in image processing and optical communication. In recent years the interest in using organic crystals with charge correlated and highly delocalized -electron states (e.g., nitroanilines with donor and acceptor substitution at parapositions) has increased considerably, since very large nonlinear optgical susceptibilities have been measured in some of the materials which make them attractive for future cw-laser applications.

The title compound is a donor-acceptor (DA) substituted benzene derivative, with a charge-transfer (CT) interaction between the para-disposed cyclooctylamino donor and the nitro acceptor groups. The compound crystallized in the

orthorrombic system (Pcmb) with two both molecules is the conformation of the cyclooctyl. TheT have structural similarity to NPP, PNP and COANP, in all compounds the aromatic ring is essentially planar. An analysis of seminormal probability indicate that the big difference betwwen monomeric molecules in the asymmetric unit.

References:

Nonlinear Optical Properties of Organic and Polymeric Materials, edited by D.J. Williams, ACS Symp. Ser. 233 (American Chemical Society, Washington, DC, 1983)

D.J. Williams, Angew. Chem.Int. De. Engl. 23, 690 (1984)