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1.
Abstract Infrared and Raman spectra (4000-200 cm?1) were recorded for 4-vinylpyridine and vibrational assignments made for fundamental modes on the basis of frequency shifts of the coordinated ligand, of the group vibrational concept and comparison with the assignments for related molecules. the infrared spectra of M(4-vinylpyridine)2Ni(CN)4 (M=Mn, Cd, Fe, Co, Ni or Cu) are reported. 相似文献
2.
Infrared and Raman spectra of seven new metal (II) 3,4-lutidine tetracyanonickelate complexes, M(3,4 L)2 Ni(CN)4 [where 3,4 L = 3,4 - dimethyl-pyridine or 3,4-lutidine; M = Mn, Fe, Co, Zn, Ni, Cu or Cd] (abbreviated to M - Ni - 3,4 L) have been investigated. Spectroscopic and magnetic susceptibility measurements indicate that the compounds have the structure of Hofmann-type complexes. The copper complex has spectral features different from the other compounds. 相似文献
3.
Claudia C. Wagner Selene Calvo María H. Torre Enrique J. Baran 《Journal of Raman spectroscopy : JRS》2007,38(4):373-376
The infrared and Raman spectra of 5‐chloro‐7‐iodo‐8‐hydroxyquinoline (clioquinol, CQ) and that of its Cu(II) complex of stoichiometry [Cu(CQ)2] were recorded and briefly discussed. Some comparisons were made with related complexes. The interest of the investigated systems in relation to Alzheimer's disease is briefly commented. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
4.
The new complexes trans-[PdX2(H4MTO)2] (X = Cl, Br, I), trans-[PdX2(H3MMTO)2] (X = Cl, Br, I), trans-[PdX2(SH3)2] (X = Cl, Br), [Pd(H4MTO)4]CI2 and [Pd(H3MMTO)4]CI2, where H4MTO = monothiooxamide, H3MMTO = N(o)-methylmonothiooxamide and SH3 = N(s)-methylmonothiooxamide, have been prepared. The complexes were characterized by elemental analyses, conductivity measurements, X-ray powder patterns, thermal methods and spectroscopic (UV/VIS, FT-IR, Laser-Raman) studies. The vibrational analysis of the complexes is given using NH/ND and CH3/CD3 isotopic substitutions. Monomeric square planar structures are assigned for the complexes in the solid state. The neutral monothiooxamides behave as monodentate ligands coordinating through their thioamide sulfur atom. The complex [Pd(SH2)2] was isolated during the thermal decomposition of trans-[PdCl2(SH3)2]. 相似文献
5.
Evidences of Electronic Effects in the Vibrational Spectra of Some Rhodium(II) Carboxylate Complexes
Abstract Abstract - A series of dirhodium tetracarboxylate complexes, containing triphenylphosphine as axial ligand was investigated by electronic and Raman spectroscopy, aiming to detect the influence of electronic effects of the carboxylate substituents on the v1[v(RhRh)] and v2[v(RhO)] Modes. When pairs of complexes with similar molecular weights are compared, as in the case of the cyclopentanecarboxylate and trifluoroacetate complexes, the striking difference in the inductive character of the two species results in substantial shifts of the v1 and v2 modes as a consequence of variations in the corresponding force constants rather than a simple mass effect as previously observed for non-substituted rhodium-carboxylates. 相似文献
6.
The new complexes CuX2(LH2), CuX2 (SH3) (X = Cl, Br), CuX(LH2), CuX(SH3) (X = Cl, Br, I), CuX(H4MTO)2 (X = Cl, Br), Cul(H4MTO) and CuX(H3MMTO)2 (X = Cl, Br, I), where LH2 = N.N′-dimethyl-monothiooxamide, SH3 = N(s)-methylmonothiooxamide, H4MTO = monothiooxamide and H3MMTO = N(o)-methylmonothiooxamide, have been prepared. The complexes were characterized by elemental analyses, conductivity measurements, magnetic moments and spectroscopic (UV/VIS, FT-IR, Laser-Raman) studies. The vibrational analysis of the complexes has been given using NH/ND, CH3/CD3 and 63cu/65cu isotopic substitutions. The neutral monothiooxamides behave as monodentate ligands in the Cu(I) complexes coordinating through their thioamide sulfur atom. The ligands LH2 and SH3 act as bidentate chelating agents in the Cu(II) complexes with ligated atoms being the thioamide sulfur and the amide oxygen. 相似文献
7.
The IR and Raman spectra of Crystalline Tetrapropylammonium trichlorozincate (II) have been measured at room and liquid nitrogen temperatures. The spectra have been interpreted in terms of halogen bridged structures. The complete coincidence of the IR and Raman bands suggests a symmetry lower than D2h and rules out any centrosymmetric structure. 相似文献
8.
Albert W. Herlinger 《光谱学快报》2013,46(10):787-797
Abstract The laser Raman spectra of crystalline [(CH3)4N] HgCl3 and [(CH3)4N]2HgCl4 have been studied in the 400–20 cm?1 region. All expected Raman active modes for the HgCl3 ? and HgCl4 ?2 ions are observed and assignments of the vibrational frequencies are made in relation to the structure of the anions. 相似文献
9.
The FT-Raman spectrum of cupferron, [PhN2O2]NH4 and the micro-Raman spectra of the new corresponding cobalt(II) cupferronato complexes, CoL2A2, L = PhN2O2, a = H2O, MeOH, o-C6H4(NH2)2, p-C6H4(NH2)2 and CoL2A, a = (-C6H4NH2-p)2 were recorded and discussed. All the complexes show a Raman band at about 1302 cm1 and the characteristic v(N-N) and δ(ONNO) modes of the anionic ligand. the vibrational analysis of the title compounds reveals the electron delocalisation over the N-nitroso-N-hydroxylaminato (ONNO) unit, as well as the bidentate coordination of the cupferronato ligand to the metal center through the oxygen atoms. 相似文献
10.
镧与半乳糖醇的两种配合物的FTIR和Raman光谱研究 总被引:1,自引:0,他引:1
本文用傅里叶变换红外和拉曼(FTIR和Raman)光谱对镧与半乳糖醇形成的两种配合物进行了研究。结果表明镧可以与半乳糖醇形成1:1和2:1两种配合物,它们的红外与拉曼光谱存在着一定的差别,这表明镧与半乳糖确实形成了两种配合物。 相似文献
11.
Abstract The infrared and Raman spectra of trans-Ni(S2N2CH3)2 and Pd(S3N)2 were measured from 4000-200 cm?1. The absorption bands were assigned by comparison to the sulfur nitride complexes of nickel(II), palladium(II) and platinum(II). Normal coordinate analyses on these complexes were carried on these data using molecular parameters taken from X-ray data. To aid in band assignments, isotope shift data on trans-62Ni(S2N2CH3)2 have also been carried out. 相似文献
12.
由于原子簇化合物在催化,生物活性,功能材料等方面所呈现的重要性,使其成为无机和物理化学最重要的研究领域之一。文章中和谱学方法对一些具有混配体的过渡金属簇合物的结构及其两者之间的关系进行. 相似文献
13.
Abstract Band assignments in the IR spectra (700–150 cm?1) of [M(amp)3] (ClO4)2 (amp = 2-aminomethylpyridine; M = Mn(II), Fe(II), Co(II), Ni(II), Zn(II), [Zn(amp)2Cl2] and [Pt(amp)Cl2] derived from amp-ND2, their unlabelled analogues, [Zn(amp)2X2] (X = Br, I) and [Pt(amp)Br2] are discussed. 相似文献
14.
G. M. S. El-Bahy 《Journal of Applied Spectroscopy》2005,72(1):111-116
The composition of Fenugreek seeds in the form of powder, ash, and oil is investigated through FTIR and FT Raman spectra measurements. The results indicate that Fenugreek seeds (powder) are rich in proteins. Fats (lipids) and starch are present in small amounts in the seeds. The FTIR absorption bands of seed powder appeared at: 3365 cm–1 assigned as N-H stretching vibrations (amide A of protein), 1657 cm–1 (C=O, amide I), 1540 cm–1 (N-H bending vibration, amide II), and 1240 cm–1 (N-H bending, amide III). In the FT Raman spectra the band at 1661 cm–1 is ascribed to amide I (C=O) of proteins while the band at 1080 cm–1 indicates the starch. The fenugreek oil Fourier transform infrared absorbance ratios A(3009 cm–1)/A(2924 cm–1), A(3009 cm–1)/A(2854 cm–1), and A(3009 cm–1)/A(1740 cm–1) were considered for measuring the iodine values. These ratios (0.3609, 0.4916, and 0.4129) revealed that the iodine value of fenugreek oil is higher than that of other oils. On the other hand, the ash of fenugreek is very rich in phosphate compounds. The spectra showed absorption bands at frequencies 1082, 1000, 618, and 566 cm–1, and the FT Raman spectrum showed a strong absorbance band at 793 cm–1, which is due to phosphate compounds. It could be concluded that the inorganic part of fenugreek consists mainly of phosphate compounds. The Fenugreek seed contains proteins, fat, fiber, and ash, which is in complete harmony with AACC, 1980.__________Published in Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 1, pp. 106–110, January–February, 2005. 相似文献
15.
The IR and Raman Spectra of pentaiododimercurate (II) and octaiodotrimercurate (II) anionic complexes have been obtained in the solid state and interpreted in terms of halogen-bridged structures. Spectroscopic and chemical evidences support a dimeric structure for the pentaiododimercurate (II) anion. The addition of HgBr2 and HgI2 to tetraiodocadmate (II), mercurate (II) and tetrabromocadmate (II) species have also been studied. The vibrational spectra also support halogen-bridged structures for these new mixed binuclear complexes. 相似文献
16.
基于金刚石表面形貌的研究,有可能为反演金刚石的形成环境及为金刚石的合成工艺设计提供科学线索。采用光学显微镜、红外光谱、拉曼光谱对扬子克拉通西部的天然砂矿金刚石表面形貌与杂质氮、氢含量及有序度的关系研究结果表明,金刚石的表面形貌包括与晶体生长相关的微形貌、与晶体定向相关的熔蚀形貌、与晶体定向无关的熔蚀形貌及与应力形变相关的形貌等四大类;金刚石以IaAB型为主,氮含量介于22.90~752.40 μg·g-1之间,绝大部分样品的sp3杂化C-H键浓度含量高于sp2杂化C-H键,氢杂质的存在有利于A氮心向B氮心转变;sp3杂质C-H键的存在对金刚石表面出现的形貌类型可能不会造成实质性的影响,但极利于形成熔蚀坑;各种表面形貌的存在都会降低金刚石的表面有序度,但发育晕线者的表面有序度相对最高,而发育三角形生长片层者表面有序度最低。 相似文献
17.
三乙烯四胺基双(二硫代甲酸钠)及其重金属配合物的光谱研究 总被引:2,自引:0,他引:2
采用红外光谱、紫外光谱、原子吸收光谱及元素分析研究了三乙烯四胺基双(二硫代甲酸钠)(DTC-TETA)的结构及其重金属配合物的配位行为。在DTC-TETA的红外光谱图中,在1 461~1 388 cm-1处和1 174~996 cm-1处分别出现含有部分双键性质的CN键和CS键的特征吸收峰;在紫外光谱图中,分别在265和290 nm处出现两个最大吸收峰,分别对应于N…C…S基团的π—π*跃迁和S…C…S基团中硫原子上非键电子向共轭体系的n—π*跃迁;元素分析结果表明该化合物中碳、氢、氮、硫的摩尔比近似为2∶4∶1∶1。在Cu(Ⅱ), Cd(Ⅱ), Zn(Ⅱ), Ni(Ⅱ)配合物的紫外光谱图中分别在紫外区的321, 310, 311, 325 nm处出现新的最大吸收峰。流动注射与火焰原子吸收联用分析结果表明DTC-TETA对铜、镉、镍、锌等重金属离子的络合能力强于二乙基二硫代氨基甲酸钠(DDTC)。 相似文献
18.
Two new Hofmann-type complexes, M (1,3-thiazolidine-2-thione)2 Ni(CN)4 (where M = Ni and Cd), were synthesized and characterized by elemental analysis, magnetic susceptibility data, IR and Raman Spectroscopy. Their structure consist of planar infinite polymeric layers of {M-NI(CN)4}∞. 1,3-thiazolidine-2-thione coordinated to M atom above and below this layers is monodentate and S-bonded in these complexes. 相似文献
19.
Raman spectra of the species Hg(SCN)2, [Hg(SCN)3], and [Hg(SCN)4]2- in solution of ten aprotic donor solvents have been investigated in the region of the Hg-S vibration. Observed frequency values of measured band of Hg(SCN)2 and [Hg(SCN)3] in different solutions correlate well with donor strength of the solvents. There is a linearity between Hg-S frequency decreasing and increasing of the interaction of the solvent molecules with the mercury (II) ion in the thiocyanate complexes. No significant frequency changes have be found for [Hg(SCN)4]2-. Evidence based on the frequency shifts and depolarization ratios in various solvents supports the view that the Hg(SCN)2 in solution undergos departure from linearity as a result of increasing solvent coordination to the mercury (II) ion. Almost constant frequencies of Hg-S vibration of [Hg(SCN)4]2- in all investigated solvents suggest a regular tetrahedral structure of the ion in solution having much larger radius than corresponding HgX4 (X=Cl,Br,I) ions. 相似文献
20.
The Raman and IR. spectra of solid diamminediiodidezinc (II) with 15N and 2H isotopic substitution have been measured. The spectra have been interpreted assuming C2v symmetry for the Zn(NH3)2I2 complex structure. The skeletal stretching metal-ligand modes vs(ZnN), vas(ZnN), vs(ZnI), vas(ZnI) as well as the three bending modes δ(NZnN), δ(IZnI) and δ(IZnN) were assigned by comparison with the spectra of Zn(NH3)2C12 and Zn(NH3)2Br2, and by the observed isotopic shifts of the frequencies. A normal coordinate analysis for the whole complex was carried out using the Local Symmetry Force Field Model. 相似文献