Self‐Assembly of Coordination Polymers from Volatile Pd
II
and Pb
II
β‐Diketonate Derivatives through Metallophilic Interactions
摘要:
AbstractNew dimetallic coordination polymers based on neutral metal β‐diketonate derivatives can be obtained by simple cocrystallization from organic solvents. X‐ray crystallography studies have been performed for the dimetallic complexes [trans‐Pd(ki)2]*[Pb(hfa)2] (1; ki = 2‐iminopentan‐4‐onate, hfa = 1,1,1,5,5,5‐hexafluoropentane‐2,4‐dionate), [cis‐Pd(ki)2]*[Pb(hfa)2] (2), and [trans‐Pd(tmha)2]*[Pb(hfa)2]2 (3; tmha = 2,2,6,6‐tetramethyl‐3‐iminoheptan‐5‐onate). The crystals of 1 and 3 are composed of chains of coordination polymers containing alternating molecules of the metal complexes. The crystals of 2 are composed of tetrametallic species. Directed noncovalent metal–metal interactions along with the bridging ligand atoms bind the coordination polymers of these heterometallic coordination compounds. Structural evidence is reported for the formation of PdII···PbII metallophilic interactions in a series of similar compounds. A comparison of the calculated and experimental IR spectra allowed determination of the absorption bands in the region 100–600 cm–1 that correspond to the cooperative vibrations of the metal atoms that result from such interactions. The steric and electronic factors of the chelate ligands can be used to design the architecture of these new coordination polymers.
Vapor pressure and crystal lattice energy of volatile palladium(II) β-iminoketonates
作者:G. I. Zharkova、S. V. Sysoev、P. A. Stabnikov、V. A. Logvinenko、I. K. Igumenov
DOI:10.1007/s10973-010-0949-8
日期:2011.1
Volatile palladium(II) β-iminoketonates of the general formula Pd(R–C(NH)–CH–CO–R1),where R and R1 are CH3, CF3, C(CH3)3 in various combinations, were synthesized and identified. Thermal properties of the resulting palladium(II) complexes in the solid phase were studied by thermogravimetric analysis under an argon atmosphere. The temperature dependence of the saturated vaporpressure was measured for
通式为Pd(R–C(NH)–CH–CO–R 1)的挥发性钯(II)β-亚氨基酮盐,其中R和R 1为各种组合的CH 3,CF 3,C(CH 3)3进行了合成和鉴定。在氩气气氛下通过热重分析研究了固相中所得钯(II)配合物的热性能。通过流动方法和汽化过程的热力学特性,焓 ΔH T和熵 ΔS T o来测量化合物的饱和蒸气压的温度依赖性。 ,已确定。进行了晶格范德华能量( E cryst)的原子-原子电势计算, 并将结果与所研究复合物的升华焓的实验值进行了比较。