Dibenzo cycloheptanes

SET reduction of dibenzonorcaradiene (147) with lithium, sodium or potassium naphthalenide followed by quenching with water led to 9-methylphenanthrene (148) (16-24%), 9-methyl-9,10-dihydrophenanthrene (149) (33-43 %) and 6,7-dihydro-5-if-dibenzo[a,c]cycloheptane (150) (23-34%). ... 

Triplet Triplet Absorption Spectra. Triplet states of stilbenes and analogues with a fixed olefinic bond, which are unable to photoisomerize, were observed at low temperatures by flash photolysis (Tables 16a and b). T-T absorption spectra of a series of stilbenes were first reported by the group of Schulte-Frohlinde [16]. These findings were confirmed by Herkstroeter and McClure [96] and extended by others [412 415]. The properties of the "stiff stilbenes turned out to be quite consistent with those of the trans-stilbenes. cis-stilbene evaded spectral characterization even at — 196°C, probably because of rapid twisting, but an absorption maximum at 25.5 x 103cm 1 may be estimated on the basis of results with 5H-dibenzo[a,d]cycloheptane as model compound [96]. In EPA at — 196°C,... 

CCRIS 2780 Dibenzo(a,d)cycloheptadien-5-one Di-benzo(a,d)cyclohepta(1,4)dien-5-one 5H-Dibenzo-(a,d)cyolohepten-5-one, 10,11-dihydro- Dibenzo-(b,f)cycloheptan-1-one Dibenzocycloheptenone Di-benzosuberan-5-one Dibenzosuberone 2,3 6,7-Di-benzosuberone Dibenzsuberone 10,11-Dihydro-5H-dibenzo(a,d)cyclohepten-5-one 10,11 -Dihydrodibenzo-... 

N,N-Dimethyl-5H-dibenzo a, d cycloheptane-A, y-propylamine hydrochloride 1-Propanamine, 3-(5H-dibenzo [a, d cyclohepten-5-ylidene)-N, N-dimethyl-, hydrochloride Proheptatriene Hydrochloride. 

Dibenzo (a,d) cycloheptadien-5-one Dibenzo (b,f) cycloheptan-1-one Dibenzocycloheptenone 5H-Dibenzo (a,d) cyclohepten-5-one, 10,11-dihydro-. See Dibenzosuberone Dibenzofuran CAS 132-64-9 38178-38-0 Synonyms Diphenylene oxide Empirical Ci2HsO... 

---