Triphenylmethane
Title: Triphenylmethane
CAS Registry Number: 519-73-3
CAS Name: 1,1¢,1¢¢-Methylidenetris[benzene]
Trademarks: Tritan
Molecular Formula: C19H16
Molecular Weight: 244.33
Percent Composition: C 93.40%, H 6.60%
Line Formula: (C6H5)3CH
Literature References: Prepd by ether reduction of triphenylchloromethane obtained by reaction of carbon tetrachloride and benzene in the presence of aluminum chloride: Norris, Org. Synth. 4, 81 (1925); from diphenylchloromethane and phenylmagnesium bromide: Sayles, Kharasch, J. Org. Chem. 26, 4210 (1961).
Properties: Orthorhombic pyramidal, solvated crystals containing one mol benzene, mp 78.2°, dries on exposure to air. When dry, mp 93.4° (stable form; there are 2 metastable forms). d4100 1.0134; bp760 360°; bp200 239.7°; bp100 228°; bp60 221°; bp40 215.5°; bp20 206.8°; bp10 197°; bp5 188°; bp1.0 170°. nD100 1.59546. Absorption spectrum: Orndorff, J. Am. Chem. Soc. 49, 1543 (1927); Anderson, ibid. 50, 209 (1928); 51, 1890 (1929). Very sol in ether, hot alcohol, chloroform. Sol in petr ether, benzene, CS2. Slightly sol in glacial acetic acid. Soly (parts/100 parts satd soln (w/w) at 30°) 48.6 in chloroform; 12.5 in hexane; 53 in CS2; 7.24 parts in benzene (19°).
Melting point: mp 78.2°; mp 93.4°
Boiling point: bp760 360°; bp200 239.7°; bp100 228°; bp60 221°; bp40 215.5°; bp20 206.8°; bp10 197°; bp5 188°; bp1.0 170°
Index of refraction: nD100 1.59546
Density: d4100 1.0134

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