The synthesis, photochemistry, and photophysics of 17α-bromo-3α-(triphenylsilyloxy)-5α- androstan-6-one (1) and 17β-bromo-3β-(triphenylsilyloxy)-5α-androstan-6-one (2) have been studied in aqueous tetrahydrofuran. The 17α-bromo isomer gives evidence (reduced φf, τ1, and φisc for the ketone) for interaction between the ketone and C Br moieties in the excited singlet state. Some photodehalogenation is also observed upon excitation of the ...
