Scholarlink

Abstract <p><i>N</i>-Benzyloxycarboxamides (HL) and corresponding zirconium(IV) complexes [Zr(L)<sub>4</sub>] (L = R'C(O)NOR, R = CH<sub>2</sub>–C<sub>6</sub>H<sub>5</sub>; R' = CH<sub>3</sub> for L = baa or R' = C<sub>6</sub>H<sub>5</sub> for L = bba) are synthesized and characterized to reveal the influence of the aromatic substituent on the structures and thermal properties. The structures of Hbba, [Zr(baa)<sub>4</sub>], and [Zr(bba)<sub>4</sub>] (CIF files CCDC nos. 2 474 365, 2 474 366, and 2 474 367, respectively) are determined by single-crystal X-ray diffraction (SC-XRD) and compared with those of <i>N</i>‑methoxybenzamide analogues Hmba and [Zr(mba)<sub>4</sub>] (R = CH<sub>3</sub>, R' = C<sub>6</sub>H<sub>5</sub>). The compounds are also studied by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The thermodynamic parameters for melting of Hbba and [Zr(baa)<sub>4</sub>] have been determined for the first time. In the [Zr(L)<sub>4</sub>] complexes, the introduction of the benzyl group into L results in the disappearance of the low-temperature structural transitions (L = mba) and a decrease in the melting points (L = baa, bba). The melting points of <i>N‑</i>alkoxybenzamides increase in the order L = mba &lt; bba. Under the TGA conditions at comparable molecular weights, the [Zr(mba)<sub>4</sub>] complex partially evaporates, whereas [Zr(baa)<sub>4</sub>] decomposes.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

N-Benzyloxycarboxamides and Their Zirconium Complexes: Synthesis, Structures, and Thermal Properties

  • 期刊论文

  • 发表日期：

    2025年10月1日

查看全文
  • E. S. Vikulova,
  • K. P. Cheremnykh,
  • A. S. Sukhikh,
  • I. Yu. Ilyin,
  • A. A. Vinogradova,
  • D. P. Pishchur,
  • N. B. Morozova

摘要

Abstract

N-Benzyloxycarboxamides (HL) and corresponding zirconium(IV) complexes [Zr(L)4] (L = R'C(O)NOR, R = CH2–C6H5; R' = CH3 for L = baa or R' = C6H5 for L = bba) are synthesized and characterized to reveal the influence of the aromatic substituent on the structures and thermal properties. The structures of Hbba, [Zr(baa)4], and [Zr(bba)4] (CIF files CCDC nos. 2 474 365, 2 474 366, and 2 474 367, respectively) are determined by single-crystal X-ray diffraction (SC-XRD) and compared with those of N‑methoxybenzamide analogues Hmba and [Zr(mba)4] (R = CH3, R' = C6H5). The compounds are also studied by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The thermodynamic parameters for melting of Hbba and [Zr(baa)4] have been determined for the first time. In the [Zr(L)4] complexes, the introduction of the benzyl group into L results in the disappearance of the low-temperature structural transitions (L = mba) and a decrease in the melting points (L = baa, bba). The melting points of N‑alkoxybenzamides increase in the order L = mba < bba. Under the TGA conditions at comparable molecular weights, the [Zr(mba)4] complex partially evaporates, whereas [Zr(baa)4] decomposes.