Crystal and molecular structure of 1,2-dihydro-1-methyl-2-nitriminopyridine: X-ray and infrared studies
作者:Z. Daszkiewicz、J.B. Kyzioł、J. Zaleski
DOI:10.1016/s0022-2860(99)00112-x
日期:1999.12
Abstract The crystal and molecular structure of 1,2 dihydro-1-methyl-2-nitriminopyridine ( 1 ) at 90.0(1) K have been determined. It crystallises in an orthorhombic Pna2 1 space group with a =7.753(2), b =13.829(3) and c =6.070(1) A, Z =4, R ( F )=0.0259 for 1856 unique reflections. The pyridine ring is planar, the N(1) nitrogen atom remains sp 2 hybridised. The NNO 2 group is twisted 26° along C–N
摘要 1,2 二氢-1-甲基-2-硝基吡啶 ( 1 ) 在 90.0(1) K 下的晶体和分子结构已被确定。它在具有 a =7.753(2)、b =13.829(3) 和 c =6.070(1) A、Z =4、R ( F ) = 0.0259 的正交 Pna2 1 空间群中结晶,用于 1856 次独特反射。吡啶环是平面的,N(1) 氮原子保持 sp 2 杂化。NNO 2 基团沿C-N键扭曲26°,沿N-N键扭曲15°。扭曲是由空间位阻和/或弱 C–H⋯O 氢键引起的。(1)、N-(2-吡啶基)-硝胺(4)和N-甲基-N-(2-吡啶基)-硝胺(9)的IR光谱在溶液和固态中被记录。硝基亚氨基(1260 和1436 cm -1 ) 和异构硝胺(1236 和1536) 的频率特征在不对称伸缩振动区域显着不同。