The strained cycloheptynes 2a, 2b and 2c react with copper(I) chloride to form the dinuclear complexes [CuCl(cycloheptyne)]23a, 3b and 3c respectively. X-ray diffraction studies on all three compounds 3 show an increase in strength of the copper-alkyne bond with increasing deformation of the alkyne moiety from the ideal 180°. Thus going from the least strained alkyne (2c) to the most strained one (2a)
应变的环庚炔2a,2b和2c与
氯化
铜(I)反应,分别形成双核配合物[CuCl(cycloheptyne)] 2 3a,3b和3c。对所有三种化合物3的X射线衍射研究表明,随着
炔烃部分相对于理想180°的变形增加,
铜-
炔烃键的强度也会增加。因此,从应变最小的
炔烃(2c)到应变最大的
炔烃(2a),相应配合物中的Cu-C键长从197.5 pm(3c)降至194.9 pm(3a)。C≡CC角从145.6°(3a)超过147.4°(3b)至151.6°(3c)。