Tetrahedron Letters,Vol.23,No.l7,pp 1771-1774,1982 0040-4039/82/171771-04$03.00/O ... PHGTCCS04ICAL GSWSRATION OF KKTSNES. AN ULTRA-VIOLET AND INFRA- RED SPF.CTROSCOPIC STUDY OF 1- AND 2-DIAZONAPHTHALENONES ... Nlgel P. Sacker and Nicholas J. Turro* Department of Chermstry, Columbia Unlverslty New York, New York ... ABSTRACT. Direct photolysis of l- or 2-diazonaphthalenone and 2-dlaso- ...