Ling Jie, Albrecht-Schmitt Thomas E
Department of Chemistry and Biochemistry, 179 Chemistry Building, Auburn University, Auburn, Alabama 36849, USA.
Inorg Chem. 2007 Jul 9;46(14):5686-90. doi: 10.1021/ic700524c. Epub 2007 Jun 12.
Three new palladium compounds, PdSeO3, PdSe2O5, and Na2Pd(SeO4)2, containing selenium oxoanions of both Se(IV) and Se(VI) have been prepared under mild hydrothermal conditions. PdSe2O5 and Na2Pd(SeO4)2 both possess one-dimensional structures. Within the structure of PdSe2O5, [PdO4] square planar building blocks are joined together through diselenite, Se2O52-, anions, and form a zigzag chain along the c axis. In Na2Pd(SeO4)2, [PdO4] units are connected by two selenate, SeO42-, anions, and extend along the a axis to form a [Pd(SeO4)2]2- chain. Na+ cations reside in the space between the [Pd(SeO4)2]2- chains and act as counter cations. Unlike above two compounds, PdSeO3 exhibits a layered structure. In the structure of PdSeO3, [PdO4] units are connected to each other by corner-sharing and form a zigzag chain along the b axis. The chains are further joined together by tridentate selenite, SeO32-, anions to form layers in the [ab] plane that stack along the c axis. Crystallographic data: (193 K; Mo Kalpha, lambda=0.71073 A): PdSeO3, monoclinic, space group P21/m, a=3.8884(5) A, b=6.4170(8) A, c=6.1051(7) A, beta=96.413(2) degrees, V=151.38(3) A3, Z=2; PdSe2O5, monoclinic, space group C2/c, a=12.198(2) A, b=5.5500(8) A, c=7.200(1) A, beta=107.900(2) degrees , V=463.8(1) A3, Z=4; Na2Pd(SeO4)2, triclinic, space group P, a=4.9349(11) A, b=5.9981(13) A, c=7.1512 (15) A, alpha=73.894(4) degrees, beta=86.124(4) degrees, gamma=70.834(4) degrees, V=192.03(7) A3, Z=1.
在温和水热条件下制备了三种新型钯化合物PdSeO3、PdSe2O5和Na2Pd(SeO4)2，它们含有Se(IV)和Se(VI)的含氧硒阴离子。PdSe2O5和Na2Pd(SeO4)2均具有一维结构。在PdSe2O5结构中，[PdO4]方形平面结构单元通过亚硒酸盐Se2O52-阴离子连接在一起，沿c轴形成锯齿链。在Na2Pd(SeO4)2中，[PdO4]单元由两个硒酸盐SeO42-阴离子连接，并沿a轴延伸形成[Pd(SeO4)2]2-链。Na+阳离子位于[Pd(SeO4)2]2-链之间的空间中，作为抗衡阳离子。与上述两种化合物不同，PdSeO3呈现层状结构。在PdSeO3结构中，[PdO4]单元通过角共享相互连接，沿b轴形成锯齿链。这些链进一步通过三齿亚硒酸盐SeO32-阴离子连接在一起，在[ab]平面形成层，这些层沿c轴堆叠。晶体学数据：(193 K；Mo Kα，λ = 0.71073 Å)：PdSeO3，单斜晶系，空间群P21/m，a = 3.8884(5) Å，b = 6.4170(8) Å，c = 6.1051(7) Å，β = 96.413(2)°，V = 151.38(3) Å3，Z = 2；PdSe2O5，单斜晶系，空间群C2/c，a = 12.198(2) Å，b = 5.5500(8) Å，c = 7.200(1) Å，β = 107.900(2)°，V = 463.8(1) Å3，Z = 4；Na2Pd(SeO4)2，三斜晶系，空间群P，a = 4.9349(11) Å，b = 5.9981(13) Å，c = 7.1512(15) Å，α = 73.894(4)°，β = 86.124(4)°，γ = 70.834(4)°，V = 192.03(7) Å3，Z = 1。
