Copper and nickel dihalide complexes, their preparation and...

Details Copper and nickel dihalide complexes, their preparation and... Copper and nickel dihalide complexes, their preparation and...

C - Chemistry, Metallurgy

07

D

260/251, 260/272

C07D 453/04 (2006.01) C07D 453/02 (2006.01) C07F 1/08 (2006.01) C07F 15/04 (2006.01) C09K 9/02 (2006.01) G01N 31/22 (2006.01)

Patent

CA 1336435

Compounds of formula I Image (I), wherein X? is Cl? or Br?, M is Cu2? or Ni2?, Z is a halogen atom, -NH2, C1-C4alkyl or C2-C4alkoxy, R1 is H, methyl methoxy, halogen or -NH2, and A is a group Image or Image , wherein R2 and R3 each independently have the same meaning as R1. The compounds are simultaneously cryochromic or thermochromic and are suitable as warning indicators for cooled or heated structural elements.

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