Title: 2,3:6,7-Dibenzphenanthrene
CAS Registry Number: 222-93-5
CAS Name: Pentaphene
Additional Names: dibenzo[b,h]phenanthrene; b,b¢-dibenzphenanthrene; naphtho-2¢,3¢-1,2-anthracene
Molecular Formula: C22H14
Molecular Weight: 278.35
Percent Composition: C 94.93%, H 5.07%
Literature References: Prepn by pyrolysis of 1,2- or 1,4-di-o-toluylbenzene: Clar et al., Ber. 62, 947 (1924); Clar, John, Ber. 64, 986 (1931); Winterstein, Schön, Z. Physiol. Chem. 230, 146 (1934); from phthalic anhydride + o-tolylmagnesium bromide: Clar, Stewart, J. Chem. Soc. 1951, 3215; from 2-benzoylbenzoic acid: Marsili, Isola, Tetrahedron Lett. 1965, 3023; Franck, Zander, Ber. 99, 396 (1966).
Properties: Yellowish-green needles or leaflets from xylene, mp 257°. Absorption max (alc): 423.5, 412, 399, 379, 356, 345, 329, 314.5, 302, 289.5, 257.5, 245 nm. Sol in benzene, xylene; sparingly sol in alcohol, ether. Solns exhibit blue fluorescence in daylight.
Melting point: mp 257°
Absorption maximum: Absorption max (alc): 423.5, 412, 399, 379, 356, 345, 329, 314.5, 302, 289.5, 257.5, 245 nm
Derivative Type: Dipicrate
Molecular Formula: C22H14.2C6H3N3O7
Molecular Weight: 736.55
Percent Composition: C 55.44%, H 2.74%, N 11.41%, O 30.41%
Properties: Orange needles, mp 184°.
Melting point: mp 184°
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