Synthesis and Characterization of cis-(RNC)2PtII Species Useful as Synthons for Generation of Various (Aminocarbene)PtII Complexes
作者:Alexander G. Tskhovrebov、Konstantin V. Luzyanin、Matti Haukka、Vadim Yu. Kukushkin
DOI:10.1007/s10870-012-0371-0
日期:2012.12
Cis-Dichlorobis(tert-butylisocyanide)platinum(II), 4, and cis-dichlorobis(cyclohexylisocyanide)platinum(II), 5, were prepared by treatment of dichlorobis(propiononitrile)platinum(II), 1, with tert-butylisocyanide (2) or cyclohexylisocyanide (3). The crystal structures of 4 and 5 were determined by a single crystal X-ray diffraction. The title compounds crystalize in the triclinic space group P $$ \overline1} $$ [a = 12.1551(3), b = 12.2025(5), c = 20.9187(7) Å, α = 99.3024(15), β = 99.671(2), γ = 90.515(2)°] for 4, and in the monoclinic space group P21/n [a = 12.0396(12), b = 9.5448(9), c = 13.7759(15) Å, β = 96.698(8)°] for 5. In both structures, the Pt atoms exhibit slightly distorted square planar coordination geometry, and the isocyanide ligands are mutually in the cis-position. The fragments C–N–C–Pt in both complexes are almost linear, and the CN bonds of the isocyanide moiety [C1–N1 1.156(11) and C6–N2 1.136(11) Å (for 4), C1–N1 1.150(4) and C8–N2 1.144(3) Å (for 5)] are within the typical range for the CN triple bonds values. In addition, both compounds were characterized by elemental analyses (C, H, N), high resolution ESI+-MS, IR, 1H and 13C1H} NMR spectroscopies. Bis-isocyanide platinum(II) complexes were prepared via a new procedure and fully characterized by several analytical techniques, including NMR and X-ray diffraction.
顺式二
氯双(叔丁基异
氰化物)
铂(II)4 和顺式二
氯双(环
己基异氰化物)
铂(II)5 是由二
氯双(
丙腈)
铂(II)1 与叔丁基异
氰化物 (2) 或环
己基异氰化物 (3) 反应制备而成。4 和 5 的晶体结构是通过单晶 X 射线衍射确定的。标题化合物在三linic 空间群 P$ \overline1} $$ [a = 12.1551(3), b = 12.2025(5), c = 20.9187(7) Å, α = 99.3024(15), β = 99.671(2), γ = 90.515(2)°] 为 4,单斜空间群 P21/n [a = 12.0396(12), b = 9.5448(9), c = 13.7759(15) Å, β = 96.698(8)°] for 5.在这两种结构中,
铂原子都呈现出略微扭曲的方平面配位几何形状,异
氰酸配体互为顺式位置。两个复合物中的 C-N-C-Pt 片段几乎都是线性的,异
氰酸基的 CN 键 [C1-N1 1.156(11) 和 C6-N2 1.136(11) Å (对 4 而言),C1-N1 1.150(4) 和 C8-N2 1.144(3) Å (对 5 而言)] 都在 CN 三键值的典型范围内。此外,这两种化合物还通过元素分析(C、H、N)、高分辨率 ESI+-MS、红外光谱、1H 和 13C1H} NMR 光谱进行了表征。NMR 光谱。双异
氰酸铂(II)配合物是通过一种新的程序制备的,并通过包括核磁共振和 X 射线衍射在内的多种分析技术对其进行了全面表征。