Molecular structure and intramolecular hydrogen bond strength of 3-methyl-4-amino-3-penten-2-one and its N Me and N-Ph substitutions by experimental and theoretical methods
作者:Seyedabdollah Seyedkatouli、Mohammad Vakili、Sayyed Faramarz Tayyari、Poul Erik Hansen、Fadhil S. Kamounah
DOI:10.1016/j.molstruc.2019.02.007
日期:2019.5
spectroscopy, and X-ray crystallographic methods. The mentioned results were compared to those of 4-amino-3-penten-2-one, APO. DFT calculations suggest a relatively strong intramolecular hydrogen bond in 3-MeAPO and its N Me and N-Ph substituted derivatives with N⋯O distances of 2.597, 2.584, and 2.581 A, and calculated hydrogen bond energies of about 10.9, 13.6, and 14.9 kcal/mol in 3-MeAPO, 3-Me-MeAPO, and
摘要 在目前的工作中,3-methyl-4-amino-3-penten-2-one, 3-MeAPO, 3-methyl-4-methylamino-3-penten-2- 的分子结构和分子内氢键 (IHB)一, 3-Me-MeAPO, 和 3-methyl-4-phenylamino-3-penten-2-one, 3-Me-PhAPO 已经通过密度泛函理论 (DFT) 计算研究, 在 B3LYP/6 -311++G** 水平,以及包括核磁共振、红外、拉曼、紫外光谱和 X 射线晶体学方法在内的实验研究。将上述结果与 4-amino-3-penten-2-one, APO 的结果进行比较。DFT 计算表明 3-MeAPO 及其 N Me 和 N-Ph 取代衍生物中存在相对强的分子内氢键,N⋯O 距离为 2.597、2.584 和 2.581 A,计算出的氢键能约为 10.9、13.6 和