Research Article: Methyl 9-diethyl­amino-2,2-bis­(4-meth­oxy­phen­yl)-2H-benzo[h]chromene-5-carboxyl­ate

Date Published: April 01, 2011

Publisher: International Union of Crystallography

Author(s): Moon-Hwan Kim, Hee-Moon Park, Chong-Hyeak Kim.


In the title compound, C31H29NO5, the methyl carboxyl­ate and dimethyl­amino groups on the naphtho­pyran group are almost coplanar with the naphtho­pyran ring system [r.m.s. deviations = 0.08 (2) and 0.161 (2) Å, respectively]. The dihedral angle between the methyl carboxyl­ate and dimethyl­amino groups is 4.9 (1)°. The pyran ring has an envelope conformation with the quaternary C atom out of plane by 0.4739 (13) Å. The meth­oxy­phenyl substituent forms a dihedral angle of 16.6 (1)° with the plane of the benzene ring, while the other meth­oxy­phenyl group is almost coplanar, making a dihedral angle of 1.4 (1)°.

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For the synthesis and properties of organic photochromic and thermochromic dyes, see: Clarke et al. (2002 ▶); Gabbutt et al. (2003 ▶, 2004 ▶); Kim et al. (2010 ▶); Do et al. (2011 ▶). For their applications, see: Kumar et al. (1995 ▶); Gemert & Selvig (2000 ▶); Nelson et al. (2002 ▶); Crano & Guglielmetti (1999 ▶).




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