Crystal Structure of Antitubercular Complex: cis-(chloro)-[N,N′-bis-(diethyl-2,2′-bipyridine-3,3′-dicarboxylate)]ruthenium(II) Monohydrate
作者:Loic Toupet、Pierre H. Dixneuf、Mehmet Akkurt、Maria Daoudi、Najat Sam、Abdelali Kerbal、Zahid H. Chohan、Taibi Ben Hadda
DOI:10.1007/s10870-008-9495-7
日期:2009.6
Diethyl-2,2′-bipyridine-3,3′-dicarboxylate (3 or L) reacts with RuCl3 · 3H2O to give cis-(Cl)-[Ru(L)2Cl2] · H2O (4) and structure of the complex was determined by spectral (IR, 1H-NMR), and mass spectroscopic data, elemental analyses and X-ray crystallography. The structure is solved in triclinic, space group p-1 with a = 10.658 (2), b = 12.446 (3), c = 14.186 (5) Å, α = 104.856 (3), β = 108.704 (3), γ = 94.973 (2)°, V = 1693.2 (8) Å3, Z = 2 with final R = 0.012. The geometry of the complex is shown to be a distorted octahedral with four nitrogens of two 2,2′-bipyridyl ligands in two different planes with Ru–N distance as 2.021 (2)−2.071 (3) Å. The cis-position is occupied by two chloride atoms with Ru–Cl distance as 2.4156 (12) and 2.4167 (13) Å. The trans-axial Cl2–Ru1–N and Cl1–Ru1–N4 angles are respectively, 172.42 (7) and 174.12 (7)°. A weak hydrogen bonding is observed between the two chlorides and hydrogens of neighbouring molecule [C–H···Cl distance as 2.72, 2.77 (4) Å]. A second type of weak hydrogen bonding is also observed between the oxygens of carboxylate groups and hydrogens of a neighbouring molecule [C–H···O distance as 2.53, 2.56 and 2.34 (4) Å]. The structure of anti-tubercular precursor complexes, cis-(chloro)-[N,N′-bis-(diethyl-2,2′-bipyridine-3,3′-dicarboxylate)]ruthenium(II) monohydrate is solved by single crystal X-ray diffraction analysis which reveals geometry of the complex to be a distorted octahedral with four nitrogens of two 2,2′-bipyridyl ligands in two different planes. The cis-position is occupied by two chloride atoms.
2,2′-联吡啶-3,3′-二甲酸二乙酯(3 或 L)与 RuCl3 - 3H2O 反应生成顺式-(Cl)-[Ru(L)2Cl2] - H2O (4),并通过光谱(红外光谱、1H-NMR)、质谱数据、元素分析和 X 射线晶体学确定了该复合物的结构。晶体结构为三菱形,空间群 p-1,a = 10.658 (2),b = 12.446 (3),c = 14.186 (5) Å,α = 104.856 (3),β = 108.704 (3),γ = 94.973 (2)°,V = 1693.2 (8) Å3,Z = 2,最终 R = 0.012。该配合物的几何形状为畸变八面体,两个 2,2′-联吡啶配体的四个硝基位于两个不同的平面上,Ru-N 间距为 2.021 (2)-2.071 (3) Å。顺式位置由两个氯原子占据,Ru-Cl 间距分别为 2.4156 (12) Å 和 2.4167 (13) Å;Cl2-Ru1-N 和 Cl1-Ru1-N4 的横轴角度分别为 172.42 (7) ° 和 174.12 (7)°。两个氯化物与邻近分子的氢之间存在弱氢键[C-H--Cl 间距为 2.72、2.77 (4) Å]。在羧酸基的氧原子和邻近分子的氢原子之间也观察到第二种弱氢键[C-H--O 间距为 2.53、2.56 和 2.34 (4) Å]。抗结核前体复合物顺式-(氯)-[N,N′-双(二乙基-2,2′-联吡啶-3、3′-dicarboxylate)]ruthenium(II) monohydrate 的单晶 X 射线衍射分析表明,该配合物的几何形状为畸变八面体,两个 2,2′-联吡啶配体的四个硝基位于两个不同的平面上。顺式位置被两个氯原子占据。