Metal complex compound useful as a near infrared absorber.

摘要

A metal complex compound having the formula: <CHEM> wherein each of X1 and X2 which may be the same or different, is a nitro group, a halogen atom, a phenylazo group (inclusive of a substituted phenylazo group) or a naphthylazo group (inclusive of a substituted naphthylazo group), each of n1 and n2 which may be the same or different, is an integer of from l to 3, each of R1 and R2 which may be the same or different, is an amino group, a monoalkylamino group, a dialkylamino group, an acetylamino group and a benzoylamino group (inclusive of a substituted benzoylamino group), M is a chromium atom, an iron atom, a cobalt atom, m is an integer of at least 2, and Y<m(+)> is a bivalent or higher polyvalent metal ion.