| 摘要 |
<p>A Polycyclic metal complexe of the formula WHEREIN A1 denotes a 2-3-membered lower alkylene radical, a 1,2-lower-cycloalkylene, a 1,2-phenylene or 1,8-naphthylene radical, A2 denotes a 2-3-membered lower alkylene radical, a 1,2-lower-cycloalkylene or 1,8-naphthylene radical, Me denotes a divalent metal atom, R1 and R3 denote hydrogen atoms or lower alkyl radicals, R2 denotes a hydrogen or halogen atom or a lower alkyl, aryl, nitro, nitrile or arylazo group, or the radicals R2 and R3 form a fused five to six- membered alicyclic ring, and in the case that R1 and R3 denote lower alkyl radicals R2 must not be hydrogen, are useful for coloring polymers in red-brown shades.</p> |
