Structural Diversity of Silver Clusters in Double and Triple Salts of Silver Acetylide with Silver Perfluoro-Dicarboxylates

The reactions of Ag₂C₂ and the corresponding silver perfluoro-dicarboxylates result in the formation of three new double and triple salts, Ag₂C₂·3AgO₂CCF₂CF₂CO₂Ag·7H₂O (1), 2Ag₂C₂·6AgO₂CCF₂CF₂CO₂Ag·AgNO₃·12H₂O (2) and Ag₂C₂·4AgO₂CCF₂CF₂CF₂CO₂Ag·17.5H₂O (3), which have been structurally characterized by single crystal X-ray analysis. Their structures contain silver cages of various shapes: crown in 1, pentagonal bipyramid together with monocapped pentagonal bipyramid in 2, and square antiprism in 3, each containing an encapsulated acetylide dianion. Except for the pentagonal bipyramid, the other three silver cages are unprecedented. Compound 2 provides a unique example in which two kinds of silver polyhedra with different numbers of vertices (C₂@Ag₇ and C₂@Ag₈) co-exist in the crystal structure.     

Direct transformation of AgNO3 complex encapsulated Fullerene (C60) microcrystal on solid silver Nitrate Crystal without organic Ligands

We observed the unusual crystal transformation from solid AgNO₃ to Ag(I)-encapsulated fullerene (C₆₀) microcrystal by a coordination-driven crystallization, when casting C₆₀ solution on AgNO₃ crystal. The strong binding of Ag⁺-C₆₀ ruptures electrostatic interactions within AgNO₃ lattice, forming a binary hybrid material, which was characterized by XRD, Raman spectroscopy and mass spectrometry. Our results support the fact that AgNO₃ crystal can directly interact with fullerene C₆₀ molecules, other than through solvated metal cations. Two major factors, namely sturdy Ag⁺-olefin interaction and an enclosed cage effect play the dominating roles in crystal transformation. Adding to the regular solution-based crystallization, this facial protocol is expected to render an additional dimension in fabrication of exohedral metallofullerene architecture, regardless of solubility of metal cation in anti-solvent.     

Silver(I) Double and Multiple Salts Containing the 1,3‐Butadiynediide Dianion: Coordination Diversity and Assembly with the Supramolecular Synthon Ag4⊂CC?CC⊃Ag4

A series of 13 silver(I) double and multiple salts containing 1,3‐butadiynediide, C₄^2?, were synthesized by dissolving the silver carbide Ag₂C₄ in a concentrated aqueous solution of one or more of the silver salts AgNO₃, AgCF₃CO₂, AgC₂F₅CO₂, AgF, AgBF₄, and AgPF₆. The 1,3‐butadiynediide anion invariably adopts a μ₄,μ₄ coordination mode in these compounds, which indicates that the Ag₄?C?C? C?C?Ag₄ moiety can be used as a new type of metalloligand supramolecular synthon for the construction of coordination networks. Fine‐tuning with various ancillary anionic ligands caused the Ag₄ aggregate at each ethynide terminus to adopt a butterfly‐shaped, planar, or barblike configuration, within which the silver–ethynide interactions can be classified into three types: σ, π, and mixed (σ,π). The effect of coexisting nitrile ligands and quaternary ammonium salts on supramolecular assembly with the above synthon was also explored. The hydrolysis of PF₆^? and BF₄^? led to the formation of the quadruple salt Ag₂C₄?4 AgNO₃?AgPF₂O₂?Ag₃PO₄ and a novel (F)₂(H₂O)₁₈ hydrogen‐bonded tape in the triple salt Ag₂C₄?2 AgF? 10 AgC₂F₅CO₂?CH₃CN?12 H₂O, respectively. The largest silver–ethynide cluster aggregate described to date, (C₄)₃@Ag₁₈, occurs in 3 Ag₂C₄? 12 AgC₂F₅CO₂?5[(BnMe₃N)C₂F₅CO₂]? 4 H₂O (Bn=benzyl).     

Doping Sumanene with Both Chalcogens and Phosphorus(V): One‐Step Synthesis,Coordination, and Selective Response Toward AgI

Heterasumanenes 4 – 6 containing chalcogen (S, Se, and Te) and phosphorus atoms have been synthesized in a one‐pot reaction from trichalcogenasumanenes 1 – 3 by replacing one chalcogen atom with a P=S unit. The P=S unit makes 4 – 6 almost planar and shrinks the HOMO–LUMO gap as compared to 1 – 3 . The bonding between Ag⁺ and S atom on P=S brings about a distinct change to the optical properties of 4 – 6 ; 4 in particular shows a selective fluorescence response toward Ag⁺ with LOD of 0.21 μm . Compounds 4 – 6 form complexes with AgNO₃ to be ( 4 )₂?AgNO₃, ( 5 )₂?AgNO₃, and ( 6 )₂?(AgNO₃)₃. In complexes, the coordination between Ag⁺ and P=S is observed, which leads to shrinkage of C?P and C?X (X=S, Se, Te) bond lengths. As a result, 4 , 5 , and 6 are all bowl‐shaped in complexes with bowl‐depths reaching to 0.66 Å, 0.42 Å, and 0.40 Å, respectively. There are Ag?Te dative bonds between Ag⁺ and Te atom on telluorophene in ( 6 )₂?(AgNO₃)₃.     

Doping Sumanene with Both Chalcogens and Phosphorus(V): One‐Step Synthesis,Coordination, and Selective Response Toward AgI

Heterasumanenes 4 – 6 containing chalcogen (S, Se, and Te) and phosphorus atoms have been synthesized in a one‐pot reaction from trichalcogenasumanenes 1 – 3 by replacing one chalcogen atom with a P=S unit. The P=S unit makes 4 – 6 almost planar and shrinks the HOMO–LUMO gap as compared to 1 – 3 . The bonding between Ag⁺ and S atom on P=S brings about a distinct change to the optical properties of 4 – 6 ; 4 in particular shows a selective fluorescence response toward Ag⁺ with LOD of 0.21 μm . Compounds 4 – 6 form complexes with AgNO₃ to be ( 4 )₂?AgNO₃, ( 5 )₂?AgNO₃, and ( 6 )₂?(AgNO₃)₃. In complexes, the coordination between Ag⁺ and P=S is observed, which leads to shrinkage of C?P and C?X (X=S, Se, Te) bond lengths. As a result, 4 , 5 , and 6 are all bowl‐shaped in complexes with bowl‐depths reaching to 0.66 Å, 0.42 Å, and 0.40 Å, respectively. There are Ag?Te dative bonds between Ag⁺ and Te atom on telluorophene in ( 6 )₂?(AgNO₃)₃.     

catena‐Poly[bis[silver(I)‐μ2‐4,4′‐bipyridine‐κ2N:N′] naphthalene‐2,6‐dicarboxylate tetrahydrate]: self‐assembly of a supramolecular framework via coordination bonds and supramolecular interactions

The ultrasonic reaction of AgNO₃, 4,4′‐bipyridine (bipy) and naphthalene‐2,6‐dicarboxylic acid (H₂NDC) gives rise to the title compound, {[Ag₂(C₁₀H₈N₂)₂](C₁₂H₆O₄)·4H₂O}_n. The NDC dianion is located on an inversion centre. The Ag^I centre is coordinated in a linear manner by two N atoms from two bipy ligands. The crystal structure consists of one‐dimensional Ag^I–bipy cationic chains and two‐dimensional NDC–H₂O anionic sheets, constructed by coordination bonds and supramolecular interactions, respectively.     

A series of silver coordination polymers constructed from flexible bis(benzimidazole) ligands and different carboxylates

In this article, eight new silver coordination polymers constructed from two structurally related ligands, 1,1′-(1,4-butanediyl)bis(2-methylbenzimidazole) (bbmb) and 1,1′-(1,4-butanediyl)bis(2-ethylbenzimedazole) (bbeb), have been synthesized: [Ag(L1)(bbmb)]·C₂H₅OH·H₂O (1), [Ag(L2)(bbmb)]·C₂H₅OH (2), [Ag(L3)(bbmb)] (3), [Ag₂(L4)(bbmb)₂]·C₂H₅OH (4), [Ag(L2)(bbeb)]·C₂H₅OH (5), [Ag(L5)(bbeb)]·CH₃OH (6), [Ag₂(L6)₂(bbeb)]·H₂O (7), and [Ag₂(L7)(bbeb)₂]·4(H₂O) (8), where L1 = benzoate anion, L2 = p-methoxybenzoate anion, L3 = 2-amino-benzoate anion, L4 = oxalate anion, L5 = cinnamate ainon, L6 = 3-amino-benzoate anion, and L7 = fumaric anion. In 1-3, 5 and 6, the bidentate N-donor ligands (bbmb and bbeb) in trans conformations bridge neighboring silver centers to form 1D single chain structures. The carboxylate anions are attached on both sides of the chains. Moreover, 1 and 3 are extended into 2D layers, while 2 and 6 are extended into 3D frameworks through π-π interactions. In 4, the bbmb ligands bridge adjacent Ag(I) centers to form -Ag-bbmb-Ag- chains, which are further connected by L4 anions to form a 2D layer. The resulting layers are extended into 3D frameworks through strong π-π interactions. In 7, the N-donor ligands (bbeb) in trans conformations bridge two silver centers to generate a [Ag₂(bbeb)]²⁺ unit. The adjacent [Ag₂(bbeb)]²⁺ units are further connected via the L6 anions to form a 1D ladder chain. Moreover, the structure of compound 7 is extended into a 3D framework through hydrogen bonding and π-π interactions. In 8, two Ag(I) cations are bridged by two bbeb ligands in cis conformations to form a [Ag₂(bbeb)₂]²⁺ ring, which are further linked by L7 anions to generate a 1D string chain. Furthermore, the hydrogen bonding and π-π interactions link L7 anions to form a 2D supramolecular sheet. Additionally, the luminescent properties of these compounds were also studied.     

Hierarchical assembly of a novel luminescent silver coordination framework with 4-(4-pyridylthiomethyl)benzoic acid

A novel Ag(I) coordination polymer, [Ag₂(μ-ptmb)(μ₃-ptmb)]·2H₂O (1), (ptmb=4-(4-pyridylthiomethyl)benzoate), has been synthesized through self-assembly of AgNO₃ with Hptmb in CH₃CN/H₂O mixed solution and characterized by elemental analysis and IR spectra. X-ray diffraction analysis shows that it is a 1D tape-like structure consisting of two kinds of rectangles, which is further hierarchically assembled by Ag?S and S?S weak interactions to form 3D open framework. Luminescence study indicates the complex has an emissive maximum at 500 nm in the solid state at room temperature.     

Ammine(2,2′‐bipyridine‐κ2N,N′)silver(I) nitrate: a dimer formed by π–π stacking and ligand‐unsupported Ag...Ag interactions

Reaction of AgNO₃ and 2,2′‐bipyridine (bipy) under ultrasonic treatment gave the title compound, [Ag(C₁₀H₈N₂)(NH₃)]NO₃. The crystal structure consists of dimers formed by two symmetry‐related Ag^I–bipy monomers connected through intra‐dimer π–π stacking and ligand‐unsupported Ag...Ag interactions. A crystallographic C2 axis passes through the mid‐point of and is perpendicular to the Ag...Agⁱ(−x + 1, y, −z + ) axis. In addition, each Ag^I cation is coordinated by one chelating bipy ligand and one ammine ligand, giving a trigonal coordination environment capped by the symmetry‐equivalent Ag atom. Molecules are assembled by Ag...Ag, π–π, hydrogen‐bond (N—H...O and C—H...O) and weak Ag...π interactions into a three‐dimensional framework. Comparing the products synthesized under different mechanical treatments, we found that reaction conditions have a significant influence on the resulting structures. The luminescence properties of the title compound are also discussed.     

Poly[bis(μ2‐2‐aminopyrazine‐κ2N1:N4)(μ2‐nitrato‐κ2O:O)(nitrato‐κ2O,O′)disilver(I)]: an achiral two‐dimensional coordination polymer forming chiral crystals

The solution reaction of AgNO₃ and 2‐aminopyrazine (apyz) in a 1:1 ratio gives rise to the title compound, [Ag₂(NO₃)₂(C₄H₅N₃)₂]_n, (I), which possesses a chiral crystal structure. In (I), both of the crystallographically independent Ag^I cations are coordinated in tetrahedral geometries by two N atoms from two apyz ligands and two O atoms from nitrate anions; however, the Ag^I centers show two different coordination environments in which one is coordinated by two O atoms from two different symmetry‐related nitrate anions and the second is coordinated by two O atoms from a single nitrate anion. The crystal structure consists of one‐dimensional Ag^I–apyz chains, which are further extended by μ₂‐κ²O:O nitrate anions into a two‐dimensional (4,4) sheet. N—H...O and C_apyz—H...O hydrogen bonds connect neighboring sheets to form a three‐dimensional supramolecular framework.     

In situ benzene-1,4-disulfonate ligand synthesis and electric conductivities of four silver 4-sulfobenzoate or benzene-1,4-disulfonate complexes

The reaction of 4,4′-bipyridine (bipy), AgNO₃ and 4-sulfobenzoate (4-sb) led to an unprecedented complex, {[Ag₂(4,4′-bipy)₂(H₂O)₂]·(1,4-bds)·(2H₂O)}_n (1), in which benzene-1,4-disulfonate (1,4-bds) was synthesized in situ. This does not happen in the similar 1,2-bis(4-pyridyl)ethylene (bpe) system, where the complex {[Ag₂(bpe)₂(H₂O)₂]·(4-sb)·3H₂O}_n (2) is formed. The same in situ reaction occurred when triphenylphosphine (PPh₃) was added into the bipy and silver reaction solution, resulting in the complex [Ag₂(PPh3)₄(1,4-bds)]. 2DMF (3). Complex 4, {[Ag₂(Ph₃P)₂(4-sb)(H₂O)]·(H₂O)}_n, was synthesized similar to the synthesis of complex 3, without the presence of 4,4′-bipyridine. Complexes 1-4 were characterized by single-crystal X-ray analyses, elemental analyses, IR spectra, TG analyses, fluorescence studies and electric conductivity. Complexes 1 and 2 are cation-anion species. Complexes 3 and 4 are silver triphenylphosphine complexes, where the phenyl embrace interactions play important roles. In 3, the six-fold phenyl embrace (6PEs) connect the molecules into a 1-d hybrid zig-zag infinite chain. Complex 4 is a one-dimensional branch-like polymer containing a 1-d necklace-like backbone made up of an [Ag₂(4-sb)(H₂O)] unit and PPh₃ ‘‘leaves”. Two new coordination modes for the 1,4-bds ligands and one for the 4-sb ligand are observed. Complexes 1-3 are semi-conductors, while complex 4 is an insulator.     

The Structures of Medium-Ring Compounds. Part XVII. Crystal and molecular structures of cis-cyclodecene. 1/2 AgNO3 and 1,1,4,4-tetramethyl-cis-cyclodec-7-ene. 1/2 AgNO3

The crystal structures of cis-cyclodecene. 1/2 AgNO₃ (monoclinic, a = 5.329, b=14.53, c=27.17 Å, β=92.02°, space group C 2/c) and of 1,1,4,4-tetramethyl-cis-cyclodec-7-ene · 1/2 AgNO₃ (orthorhombic, a=5.879, b=16.86, c=28.39 Å, space group C222₁) have been determined. The relative arrangement of Ag⁺ cations, NO₃^? anions and cyclo-olefin molecules are very similar in the two crystals, but the conformations of the ring skeletons are very different.     

Diagramme de phases du systeme binaire AgNO3—RbNO3

Phase diagram of the binary system AgNO₃—RbNO₃ was studied using thermal analysis technique, differential scanning calorimetry and X-ray diffraction. This binary exhibits a congruently melting compound Ag_0.5Rb_0.5NO₃ (m. p.=138°C), an incongruently melting one Ag_0.33Rb_0.66NO3 with two polymorphic varieties, two eutectics at (36 mol% RbNO₃, 128°C) and at (60 mol% RbNO₃, near 134°C) respectively and a peritectic at (60.5 mol% RbNO₃, 141°C). This system contains also three invariant reactions at 164, 222 and 282°C due to the phase transitions of RbNO₃ and another one at 164°C due to the phase transition of AgNO₃.

Ce travail a été présenté aux 32èmes JCAT, tenues à Hammamet, TN, du 12 au 14 Mai 2001.     

Chemiluminescence during thermolysis of the (Ph3COOCPh3)n—Ph3C· peroxide containing captured triphenylmethyl radical

Chemiluminescence (CL) in the thermolysis of (Ph₃COOCPh₃)_n—Ph₃C^· containing the triphenylmethyl radical captured during the synthesis of Gomberg's peroxide was found. Two CL emitters were identified: the triplet state of benzophenone (³Ph₂CO*) and Ph₃C^·*. Ph₃C^·* is formed due to the energy transfer from the excited ³Ph₂CO* generated in the disproportion of thermolysis intermediates, Ph₃CO^· radicals. This Ph₃C^·* luminescence is the first example of CL activation by an organic radical. Chemiluminescence during the thermolysis of Ph₃COOCPh₃ containing no Ph₃C^· is resulted from the emission of one emitter, ³Ph₂CO*. The solid-phase CL was found during the oxidation of Ph₃C^· with dioxygen after the destruction of the crystalline lattice as a result of the thermolysis of the (Ph₃COOCPh₃)_n—Ph₃C^· peroxide.     

An unprecedented three‐dimensional silver(I) cluster built up from pyrazine‐2,3‐dicarboxylate ligands

The title complex, poly[(μ‐3‐carboxypyrazine‐2‐carboxylato)(μ‐pyrazine‐2,3‐dicarboxylato)trisilver(I)], [Ag₃(C₆H₂N₂O₄)(C₆H₃N₂O₄)]_n or [Ag₃(pzdca)(Hpzdca)]_n (H₂pzdca is pyrazine‐2,3‐dicarboxylic acid), has a three‐dimensional structure. The carboxylate groups of the pzdca²⁻ and Hpzdca⁻ ligands adopt both bridging and chelating coordination modes. Although each Ag^I ion displays a tetrahedral coordination, the coordination environment of each Ag atom is very different, viz. AgN₃O, AgNO₃ and AgO₄.     

Ab initio quantum-chemical calculations of interactions of ions and hydrides of alkali metals with C3H6 and C4H8 molecules

Calculations of the C₃H₆ · LiH, C₄H₈ · M⁺, and C₄H₈ · MH systems and of C₂H₂ · MH complexes (M = Li or Na) were carried out by the unrestricted Hartree-Fock-Roothaan (UHF) method with partial optimization of the geometry using fixed geometric parameters of the C₃H₆ and C₄H₈ molecules. The standard 3-21G and 6-31G* basis sets were used. Unlike the C₃H₆ · LiH structure, the C₄H₈ · M⁺ and C₄H₈ · MH systems are typical complexes. It was found that the C₄H₈ · M⁺, C₄H₈ · MH, and C₂H₂ · MH complexes are similar in coordination of M⁺ ions and MH molecules by carbon atoms in spite of considerable differences in the interatomic distances (–1 A) between these atoms in the C₄H₈ and C₂H₂ molecules. The heats of formation (Q), which were calculated in the UHF/6-31G* approximation and using second- and fourth-order Möller-Plesset perturbation theory taking into account the electron correlation energy in the MP2/6-31G*. MP4(SDQ)/6-31G*, and MP4(SDTQ)/6-31G* approximations, satisfy the following relationships: Q(C₂H₃ · MH) < Q(C₄H₈ · MH) < Q(C₄H₈ · M⁺). It was observed that in going from Li to Na the corresponding values of Q tend to decrease.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya. No. 7, pp. 1636–1640, July, 1996.     

Structures of the silver complexes with lutidines according to the NMR data. Crystal structure of [AgNO3(3,5-Lut)2]

The silver(I) nitrate complexes with 2,3-, 2,4-, 2,6-, and 3,5-lutidine (Lut, dimethylpyridine C₇H₉N), [AgNO₃(Lut)₂], are synthesized and studied by multinuclear NMR (¹H, ¹³C, and ¹⁵N) in various solvents (chloroform, dimethyl sulfoxide, and acetonitrile). The influence of steric and electronic factors of the organic ligand on the parameters of the NMR spectra is revealed. It is shown that the ¹⁵N NMR spectra are the most informative. The structure of complex [AgNO₃(3,5-Lut)₂] is determined. The crystals are monoclinic, space group C2/c, a = 14.599(1) Å, b = 8.422(1) Å, c = 12.954(1) Å, β = 99.60(1)°, V = 1570(2) ų, ρ_calcd = 1.625 g/cm³, Z = 4. The structure is built of discrete neutral complexes [AgNO₃(3,5-Lut)₂]. The coordination mode of the Ag⁺ ion includes two nitrogen atoms of two crystallographically equivalent lutidine ligands (Ag-N 2.194(5) Å, angle NAgN 147.6(3)°). The nitrate ion behaves as a weak chelating ligand with respect to the Ag⁺ ion (Ag…O 2.674(6) Å).     

Effect of synthetic conditions on the structures of silver(I)-hexamethylenetetramine coordination polymers: crystal structures of two three-dimensional frameworks featuring new topological motifs

Two novel coordination complexes, [Ag₃(μ₄-hmt)₂(μ-ssa)(H₂O)](NO₃)·3H₂O 1, and [Ag₈(μ₃-hmt)₂(μ₄-hmt)₂(μ-pma)₂(μ-H₂O)₃]·18H₂O 2 (hmt=hexamethylenetetramine, ssa=sulfosalicylate and pma=1,2,4,5-benzenetetracarboxylate), have been prepared and structurally characterized. Crystal data: 1 C₁₉H₃₃Ag₃N₉O₁₃S, orthorhombic, Pna2₁, a=20.483(7) Å, b=21.890(1) Å, c=6.493(2) Å, V=2911.3(13) Å³, Z=4; 2 C₄₄H₉₄Ag₈N₁₆O₃₇, monoclinic, C2/c, a=32.099(10) Å, b=12.916(3) Å, c=21.431(8) Å, β=126.74(1)°, V=7120(4) Å³, Z=4. Both complexes exhibit unprecedented and different topological motifs of Ag-hmt networks. Complex 1 is a novel three-dimensional cationic network with two types of channels, in which the larger one is the largest one in Ag-hmt networks; while 2 is a three-dimensional network with cylindrical channels, consisting of mixed μ₃- and μ₄-hmt ligands. The results demonstrate that under different synthetic conditions, such as the presence of multiple small counter anions or different pH values, different Ag-hmt linkages may be formed to generate new three-dimensional networks.     

Synthesis and X-ray structures of new chiral Ag(I) complexes with biaryl-based N4-donor ligands

Condensation of (R)-2,2′-diamino-1,1′-binaphthyl or (R)-6,6′-dimethylbiphenyl-2,2′-diamine with 2 equiv of 2-pyridine carboxaldehyde in toluene in the presence of molecular sieves at 70 °C gives (R)-N,N′-bis(pyridin-2-ylmethylene)-1,1′-binaphthyl-2,2′-diimine (1), and (R)-N,N′-bis(pyridin-2-ylmethylene)-6,6′-dimethylbiphenyl-2,2′-diimine (3), respectively, in good yields. Reduction of 1 with an excess of NaBH₄ in a solvent mixture of MeOH and toluene (1:1) at 50 °C gives (R)-N,N′-bis(pyridin-2-ylmethyl)-1,1′-binaphthyl-2,2′-diamine (2) in 95% yield. Rigidity plays an important role in the formation of helicate silver(I) complexes. Treatment of 1, or 3 with 1 equiv of AgNO₃ in mixed solvents of MeOH and CH₂Cl₂ (1:4) gives the chiral, dinuclear double helicate Ag(I) complexes [Ag₂(1)₂][NO₃]₂ (4) and [Ag₂(3)₂][NO₃]₂ · 2H₂O (6), respectively, in good yields. While under the similar reaction conditions, reaction of 2 with 1 equiv of AgNO₃ affords the chiral, mononuclear single helicate Ag(I) complex [Ag(2)][NO₃] (5) in 90% yield. [Ag₂(1)₂][NO₃]₂ (4) can further react with excess AgNO₃ to give [Ag₂(1)₂]₃[NO₃]₂[Ag(CH₃OH)(NO₃)₃]₂ · 2CH₃OH (7) in 75% yield. All compounds have been fully characterized by various spectroscopic techniques and elemental analyses. Compounds 1 and 5-7 have been further subjected to single-crystal X-ray diffraction analyses.     

Verbindungen der Seltenerdelemente mit α-4-Dimethylaminobenzoinoxim

Zusammenfassung Es wurden VerbindungenLnCl₃·H₂ DBox ^* (Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb) und La₂(DBox)₃·6 CH₃OH, Pr₂(DBox)₃·6 CH₃OH, Nd₂(DBox)₃·3 C₂H₅OH, Sm₂(DBox)₃· ·3 C₂H₅OH, Gd₂(DBox)₃·3 C₂H₅OH, Tb₂(DBox)₃·2 C₂H₅OH, DyH(DBox)₂·2 C₂H₅OH, HoH(DBox)₂·2 C₂H₅OH, ErH(DBox)₂, YH(DBox)₂·H₂O isoliert. Diese wurden mittels Thermoanalyse und Röntgenstreuung untersucht sowie ihre IR-Absorptionspektren gemessen und diskutiert.

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Compounds of rare earth elements with -4-dimethylaminobenzoinoxime

The compoundsLnCl₃·H₂ DBox ^* (Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb) and La₂(DBox)₃·6 CH₃OH, Pr₂(DBox)₃·6 CH₃OH, Nd₂(DBox)₃·3 C₂H₅OH, Sm₂(DBox)₃·3 C₂H₅OH, Gd₂(DBox)₃· ·3 C₂H₅OH, Tb₂(DBox)₃·2 C₂H₅OH, DyH(DBox)₂·2 C₂H₅OH, HoH(DBox)₂·2 C₂H₅OH, ErH(DBox)₂ and YH(DBox)₂·H₂O were isolated, and studied by thermoanalysis and X-ray diffraction. Their IR absorption spectra were recorded and are discussed.