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📜十九酰氯,甲胺 以 氯仿 作为反应溶剂,化学反应生成 十九烷酸n-甲酰胺
参考文献:Infrared Study Of The Amide Group Isolated In An Amorphous Hydrocarbon Matrix At Low Temperature: Aggregation And Rearrangement Upon Annealing
标题:Infrared Study Of The Amide Group Isolated In An Amorphous Hydrocarbon Matrix At Low Temperature: Aggregation And Rearrangement Upon Annealing
摘要:The Amide Group In A Number Of Methyl N-Alkyl And C-Alkyl Amides Has Been Isolated At Low Temperature In A Hydrocarbon Environment. The Infrared Spectrum Of The Free Amide Group Has Been Measured And Its Characteristic Bands Assigned. The Amide Bands For Some Of The Hydrogen Bonded N-Mers Have Also Been Characterized: The Isolation Was Achieved By The Condensation Of Alkyl Amide Vapor Onto The Surface Of A Window At 8 K. Dilution With N-Alkane Vapor During The Deposition Was Employed To Increase The Degree Of Isolation. The As-Deposited Films At 8 K Were Completely Amorphous. A Series Of Major Structural Changes occurred While The As-Deposited Films Were Annealed. These Were Monitored By Infrared Spectroscopy. With Increasing Temperature,The Relative Concentrations Of The Various N-Mer Species Change To Favor The Higher N-Mers. In Addition,The Hydrocarbon Chains Undergo Conformational Ordering,Accompanied By A Transformation Of The Amorphous Solid To A Crystalline Solid. The Triclinic Subcell Of The Crystal Changes To Orthorhombic Perpendicular With Increasing Temperature. The Onset Temperature And The Chain-Length Dependence Of The Onset Temperature For The Various Solid-Solid Transformations Were Compared To The Corresponding Values Reported Previously For Similarly Prepared Amorphous Films Of The N-Alkanes.
DOI:10.1021/j100007A061