The isotropic and anisotropic parts of Raman spectra corresponding to CO stretching and NH₂ bending modes of formamide (HCONH₂) in different acetonitrile (CH₃CN) concentration were investigated in the region 1500−1800 cm⁻¹ to study the non-coincidence effect. The experimentally obtained values of NCE with varying solvent concentrations were explained using three different models namely, Mirone-Fini model, Mirone-McHale model, and Logan model respectively. The experimentally measured values of non-coincidence splitting, $\text{Δ}{\nu }_{nce}$, for neat HCONH₂ in the modes corresponding to CO stretching and NH₂ bending are ∼21 and ∼11.38 cm⁻¹ which then reduces to a very low value of 1.26 and 0.5 cm⁻¹ at mole fraction, ${\varkappa }_f=0.1$ respectively. It has been observed that Mirone-McHale model and Logan model reproduces better experimental results of NCE of the CO stretching mode whereas Mirone-Fini model gives accurate results to explain the experimental results of NCE of the NH₂ bending mode.

在 1500-1800 cm ^-1区域研究了与甲酰胺 (HCONH ₂ ) 在不同乙腈 (CH ₃ CN) 浓度下的CO 拉伸和 NH ₂弯曲模式相对应的拉曼光谱的各向同性和各向异性部分，以研究非重合影响。分别使用三种不同的模型，即 Mirone-Fini 模型、Mirone-McHale 模型和 Logan 模型来解释不同溶剂浓度下实验获得的 NCE 值。非重合分裂的实验测量值，$\text{Δ}{\nu }_{nC\mathrm{电子}}$用于整齐HCONH ₂在对应于C中的模式O伸缩和NH ₂弯曲是~21和~11.38厘米^-1，然后减小到1.26非常低的值和0.5厘米^-1处的摩尔分数，${ⅰ}_F=0.1$分别。已经观察到，Mirone-McHale模型和Logan模型再现了更好的CO拉伸模式的NCE实验结果，而Mirone-Fini模型给出了准确的结果来解释NH ₂弯曲模式的NCE实验结果。