Department of Chemistry, Adam Mickiewicz University, 61-614 Poznan, Poland.
Chem Commun (Camb). 2018 Apr 10;54(30):3727-3730. doi: 10.1039/c8cc00952j.
Trianglimine, a chiral triangular-shaped hexaimine, exists in at least three apohost polymorphic forms. Form I had been previously obtained by crystallisation from a mixture of dichloromethane and acetonitrile and we have now crystallised Form II from acetone. Both forms possess similar packing arrangements, but Form II undergoes a reversible phase transition to Form III, as well as colossal anisotropic positive thermal expansion. Form I does not exhibit any remarkable thermal properties.
三角并六胺是一种手性三角型六氨络合物，至少存在三种无主体多晶型物形式。形式 I 以前曾通过二氯甲烷和乙腈混合物结晶获得，我们现在已从丙酮中结晶出形式 II。两种形式都具有相似的堆积排列，但形式 II 会经历到向形式 III 的可逆相转变，以及巨大的各向异性正热膨胀。形式 I 没有表现出任何显著的热性质。
