Crystal of fluoran compound and preparation process of the cryst

Details Crystal of fluoran compound and preparation process of the cryst Crystal of fluoran compound and preparation process of the cryst

1991-09-10

1993-05-11

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D49310

Patent

active

052102211

ABSTRACT:
Disclosed are a crystal of a fluoran compound having the formula (I) comprising exhibiting high peaks at diffraction angles (2.theta.) of 7.5.degree. and 17.0.degree. and relatively high peaks at diffraction angles (2.theta.) of 15.1.degree., 19.1.degree., 21.5.degree. and 25.3.degree. in an X-ray diffraction diagram by the Cu-K.alpha. beam and a crystal of a fluoran compound having the formula (II) comprising exhibiting high peaks at diffraction angles (2.theta.) of 5.5.degree. and 19.2.degree. in an X-ray diffraction diagram by the Cu-K.alpha. beam, which is useful as a color forming compound in recording materials. ##STR1##

REFERENCES:
patent: 5017710 (1991-05-01), Igaki et al.
patent: 5110952 (1992-05-01), Harada et al.
Patent Abstracts of Japan, vol. 9, No. 160, p. 121 C 289 (Jul. 4, 1985).

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