Beitrag zur Photochemie der Acridiniumhalogenide

Abstract

B e itra g zu r P h o to c h e m ie d er A crid in iu m h alo g en id e I. Spektroskopisches und photochemisches Verhalten der Acridiniumund N-Methylacridiniumhalogenide V on V a l e n t i n Z ä n k e r u n d

The synthesis, spectra, and reactions of some S-alkylthiophenium salts

“…Methylene di-iodide and silver tetrafluoroborate with 2,3-dimethylbenzo[b]thiophen gave (54), while 2,3,5-trimethylbenzo[b]thiophen with 1,2-dibromoethane gave (55) and with phenethyl bromide gave (56). -dibenzo[b,d]thiophenium salts at T 6.60-6.73.…”

“…Complete loss of the phenethyl group to give the 2,3,5-trime thylbenzo [b] thiophen molecular ion was also observed. The 1-(2-brornoethyl) salt (55) fragmented similarly to compound (56), while the l-iodomethylbenzo[b]thiophenium salt (54) showed a small molecular cation peak (3y0), as well as expulsion of +CH21 and the loss of hydrogen iodide associated presumably with ring expansion to the 3,4-dimethylbenzo[b]thiapyrylium cation [cf. (61)j.…”

Hydride transfer and oxyanion addition equilibria of NAD+ analogs

“…The equilibrium constants have all been measured at 25 °C, in a solvent consisting of four parts of isopropyl alcohol to one part of water by volume. This solvent system was chosen because it dissolves all the participants in these equilibria and because its isopropyl alcohol component is an efficient trapper of free radicals.6 We believe (1) (a) This work was supported by the National Science Foundation through Grants CHE79-25990 and CHE82-15014, to the University of Minnesota, and by a grant from the Graduate School of the University of Minnesota, (b) Department of Chemistry, University of Essex, Colchester, Essex, England, U.K.…”