the crystal and in CHCl3 solution, 1,3-bis-[2,3,7,8-tetraethyl-(10 H )-dipyrrin-9-carbonyl]propane is a monomer in CHCl3, as determined by vapor phase osmometry (VPO) measurements. Its crystal structure determination revealed a folded conformation with a novel type of dipyrrinone to dipyrrinone intramolecular hydrogen bonding. Unexpectedly, the same conformation apparently persists in CHCl3 solution
由两个当量的9 H-二
吡咯烷酮和一个戊二酰二
氯合成了一种新的线性四
吡咯,其中两个二
吡啶酮通过5个碳原子串连接 。不像典型的二
吡啶酮类,它们在晶体和CHCl 3溶液中分子间氢键结合,因此1,3-双-[2,3,7,8-四乙基-(10 H )-二
吡喃-9-羰基]
丙烷是单体通过气相渗透压(VPO)测量确定在CHCl 3中的含量。它的晶体结构确定揭示了一种折叠型的构型,其具有新型的二
吡啶酮至二
吡啶酮分子内氢键。出乎意料的是,相同的构象显然仍存在于CHCl 3溶液中,如1 H NMR光谱所示。