The high-resolution Fourier transform infrared (FTIR) spectrum of formaldoxime-¹³C (¹³CH₂NOH) was recorded in the 840–930 cm⁻¹ region with an unapodized resolution of 0.0019 cm⁻¹ for a rovibrational analysis. In the analysis of the dominantly A-type ${\nu }_8$ band, a total of 1025 infrared transitions were fitted using the Watson's A-reduced and S-reduced Hamiltonians in the I^r representation with a root-mean-square (rms) deviations of 0.000430 cm⁻¹ and 0.000431 cm⁻¹ respectively. From the rovibrational analysis, the ${\nu }_8$ = 1 states rotational constants (A, B and C), five quartic terms (Δ_J, Δ_JK, Δ_K, δ_J, δ_K) and one sextic term (Φ_KJ) were derived for the first time. The band center of the ${\nu }_8$ band of ¹³CH₂NOH was found to be 890.235170(25) cm⁻¹ and 890.235182(25) cm⁻¹ in the A-reduced and S-reduced Hamiltonians respectively. Ground state rovibrational constants except for rotational constants B and C were obtained for the first time through the fitting of 443 ground state combination differences (GSCDs) derived from the infrared transitions of the ${\nu }_8$ band of ¹³CH₂NOH, together with 2 previously reported microwave frequencies. The rms deviation of the GSCD fits was the same at 0.000430 cm⁻¹ for both A-reduced and S-reduced Hamiltonians. Furthermore, rovibrational constants up to 5 quartic centrifugal distortion terms of the ground state, and the band center and rotational constants (A, B and C) of the ${\nu }_8$ = 1 state were computed from theoretical anharmonic calculations at two different levels of theory, B3LYP and MP2 with the cc-pVTZ basis set. Good agreement was found between the experimental and calculated rovibrational constants of ¹³CH₂NOH for both ground and ${\nu }_8$ = 1 states.

甲醛肟- ¹³ C ( ¹³ CH ₂ NOH)的高分辨率傅里叶变换红外 (FTIR) 光谱记录在 840-930 cm ^-1区域，未变迹分辨率为 0.0019 cm ^-1用于旋转振动分析。在分析占主导地位的A型${\nu }_8$在I ^r表示中，使用Watson 的A 减少和S 减少哈密​​顿量拟合了总共1025 个红外跃迁，均方根(rms) 偏差分别为0.000430 cm ^-1和0.000431 cm ^-1。从振动分析，${\nu }_8$ = 1周的状态转动常数（A，B和C ^），五四次项（Δ _Ĵ， Δ _JK， Δ _ķ，δ _Ĵ，δ _ķ）和一个六次项（Φ _KJ），推导出的第一次。乐队的中心${\nu }_8$的带¹³ CH ₂ NOH被发现是890.235170（25）厘米^-1和890.235182（25）厘米^-1在A-还原和S-分别减少汉密尔顿。除了旋转常数B和C之外的基态振动常数是通过拟合 443 个基态组合差异 (GSCD) 的，这些差异来自红外跃迁${\nu }_8$¹³ CH ₂ NOH波段，以及 2 个先前报道的微波频率。GSCD 拟合的均方根偏差在 0.000430 cm ^{-1 处}对于A减少和S减少的哈密顿量是相同的。此外，高达 5 个基态四次离心畸变项的振动常数，以及带中心和旋转常数（A、B和C）${\nu }_8$ = 1 个状态是根据两个不同理论水平的理论非谐计算计算得出的，B3LYP 和 MP2 使用 cc-pVTZ 基组。发现¹³ CH ₂ NOH的实验和计算的振动常数对于地面和${\nu }_8$ = 1 个状态。