摘要

Two new complexes containing the moiety of [Ni-3(dpa)(4)Cl-2], [Ni-3(dpa)(4)Cl-2]center dot 2CH(3)COCH(3) (1) and [Ni-3(dpa)(4)Cl-2]center dot 2/3CH(3)CN center dot 1/3C(6)H(14) (2), where dpa- is 2,2'-dipyridylamine anion, were synthesized. Together with previously reported five similar complexes containing the moiety of [Ni-3(dpa)(4)Cl-2], we found that the Ni-Ni distances are somewhat different while Ni-Cl and Ni-N distances are very similar in these seven complexes, which is called as bond stretch isomerism. The nature for bond stretch isomerism in these complexes is the structural symmetrical character. CCDC: 772074, 1; 772075, 2.