bluuebunny/crossref_metadata_2025_split huggingface dataset:
Halbantiperowskite II: zur Kristallstruktur des Pd3Bi2S2
Authors: Weihrich Richard , Anusca Irina 
Published: December 2005

AbstractHalfantiperovskites II: on the Crystal Structure of Pd3Bi2S2The crystallographic structure of Pd3Bi2S2 was determined from x‐ray diffraction data and compared to parkerite (Ni3Bi2S2), shandite (Ni3Pb2S2), and a high pressure form of laflammeite (Pd3Pb2S2). For Pd3Bi2S2 the structure type of corderoite, Hg3S2Cl2 (I213) was found that represents a cubic variant (a = 8,3097(9) Å) of the parkerite structure. It turns out to be a structural antitype of the low temperature cubic modification of K2Sn2O3, analogously to the previously investigated type‐antitype relation of shandit to high‐temperature K2Sn2O3. The crystal structures are derived from perovskites ABO3 and antiperovskites M3AX with only half of the O‐ and M‐sites being occupied. The M = Ni, Pd site ordering in shandite and parkerite type compounds is discussed in terms of ordered half antiperovskite (HAP) structures M3/2AS (A = Bi, Pb). The electronic band structure of Pd3Bi2S2 is calculated within the framework of density functional theory. The compound is found to behave metallic while K2Sn2O3 and corderoite are semiconductors. The bonding is analysed in terms of covalently bond [Pd3S2]δ− networks as proposed for [Sn2O3]2− and [Hg3S2]2+.
A New Preparative Approach to HgPbP14 Structure Type Materials: Crystal Structure of Cu0.73(1)Sn1.27(1)P14 and Characterization of M1−xSn1+xP14 (M = Cu, Ag) and AgSbP14
Authors: Lange Stefan , Sebastian C. Peter , Nilges Tom 
Published: December 2005

AbstractA new preparative approach, using main group iodides as mineralization agents, was developed to prepare bulk quantities of HgPbP14 [(M1)(M2)P14] type polyphosphides containing group 11 cations on the M1 and main group elements Sn or formerly unseen Sb on the M2 position. The known (M1)2+:(M2)2+ combination of cations is extended with the combination (M1)1+:(M2)3+ in AgSbP14. A single crystal structure determination was performed for Cu1−xSn1+xP14. Cu0.73(1)Sn1.27(1)P14 crystallizes orthorhombically, space group Pnma (No. 62) with lattice constants a = 12.513(2) Å, b = 9.800(1) Å, c = 10.445(1) Å, V = 1280.8(3) Å3 and Z = 4. Small differences in the cell parameters between the single crystal and powder diffraction experiments of CuSnP14 are probably due to a small homogeneity range. Tetravalent tin postulated beside divalent tin for isostructural Au0.64Sn1.36P14 could not be detected by 119Sn‐Mössbauer spectroscopic experiments for the copper tin polyphosphide.An ionic description like [(M1+)1−x(M24+)x]2+ [(M22+)(P0)10(P1−)4]2− with x = 0.33 according to a Zintl‐Klemm concept has to be substituted by a more covalent description of [(M1+)1−x(M22+)x](1+x)+[(M22+)(P14)](1+x)− for the copper tin polyphosphide.
Synthese und Struktur chiraler Heterometallatetrahedrane des Typs [Re2(M1PPh3)(M2PPh3)(μ‐PCy2)(CO)7C≡CPh] (M1 = Ag, Au; M2 = Cu, Ag, Au)
Authors: Seewald Oliver , Flörke Ulrich , Egold Hans , Haupt Hans‐Jürgen , Schwefer Meinhard 
Published: December 2005

AbstractSyntheses and Structure of Chiral Metallatetrahedron Complexes of the Type [Re2(M1PPh3)(M2PPh3)(μ‐PCy2)(CO)7C≡CPh] (M1 = Ag, Au; M2 = Cu, Ag, Au)From the reaction of Li[Re2(μ‐H)(μ‐PCy2)(CO)7(C(Ph)O)] (1) with Ph3AuC≡CPh both benzaldehyde and the trinuclear complex Li[Re2(AuPPh3)(μ‐PCy2)(CO)7C≡CPh] (2a) were obtained in high yield. The complex anion was isolated as its PPh4‐salt 2b. The latter reacts with coinage metal complexes PPh3M2Cl [M2 = Cu, Ag, Au] to give chiral heterometallatetrahedranes of the general formula [Re2(AuPPh3)(M2PPh3)(μ‐PCy2)(CO)7C≡CPh] (M2 = Cu 3a, Ag 3b, Au 3c). The corresponding complex [Re2(AgPPh3)2(μ‐PCy2)(CO)7C≡CPh] (3d) is obtained from the reaction of [Re2(AgPPh3)2(μ‐PCy2)(CO)7Cl] (4) with LiC≡CPh. 3d undergoes a metathesis reaction in the presence of PPh3CuCl giving [Re2(AgPPh3)(CuPPh3)(μ‐PCy2)(CO)7C≡CPh] (3e) and PPh3AgCl. Analogous metathesis reactions are observed when 3c is reacted with PPh3AgCl or PPh3CuCl giving 3a or 3b, respectively. The reaction of 1 with PPh3AuCl gives benzaldehyde and Li[Re2(AuPPh3)(μ‐PCy2)(CO)7Cl] (5a) which upon reaction with PhLi forms the trinuclear complex Li[Re2(AuPPh3)(μ‐PCy2)(CO)7Ph] (6a). Again this complex was isolated as its PPh4‐salt 6b. In contrast to 2b, 6b reacts with one equivalent of Ph3PAuCl by transmetalation to give Ph3PAuPh and PPh4[Re2(AuPPh3)(μ‐PCy2)(CO)7Cl] (5b). The X‐ray structures of the compounds 3a, 3b, 3e and 4 are reported.
Cs3Se22, a Selenium‐rich Caesium Polyselenide containing Se8 Crowns and $^{3}_{\infty}\rm [Se_{6}^{3-}]$ Anions with Radical Character
Authors: Kromm Anna , Sheldrick William S. 
Published: December 2005

AbstractCs3Se22 can be prepared together with the known compounds Cs2Sn2Se6 and Cs4Sn2Se6 by reacting Cs2CO3 and Sn in a CH3OH/en solution at 120 °C. The presence of CuCl and the macrocyclic ligand 1,10‐dithia‐18‐crown‐6 are essential for product formation. The caesium polyselenide consists of anionic nets $^{3}_{\infty}\rm [Se_{6}^{3-}]$ that are separated by two layers of discrete Se8 rings. Within the polymeric anions pairs of Se3·− radical anions and Se32− anions are linked through secondary interactions.
Synthesis and Crystal Structure of Ammonium Cyanimide NH4HCN2
Authors: Roßmeier Thomas , Korber Nikolaus 
Published: December 2005

AbstractThe compound NH4HCN2 (1) was prepared by the reaction of H2CN2 with liquid ammonia. The ammonium salt 1 was characterized by a low temperature single‐crystal X‐ray structure analysis. The anionic part of the structure consists of HCN2− anions, which are connected via N–H···N bonds (H···N distance: 2.47Å, DHA: 165°). The N–H···N hydrogen bonds of the ammonium ion to the anions range from 2.00 to 2.14Å (DHA = Donor···Acceptor angles: 165–176°), all N–H···N interactions together give rise to a three‐dimensional network. 1 decomposes quantitatively to dicyandiamide at room temperature.
Syntheses of Trifluoromethanethiolato Platinum(II) Complexes – Crystal Structures of cis‐Pt(SCF3)2(PPh3)2 and trans‐Pt(SCF3)Cl(PPh3)2
Authors: Kirij Natalya V. , Tyrra Wieland , Naumann Dieter , Pantenburg Ingo , Yagupolskii Yurii L. 
Published: December 2005

AbstractLigand exchange reactions of cis‐PtCl2(PPh3)2 and [NMe4]SCF3 in different ratios were studied. Depending on the stoichiometry reactions proceeded with formation of products expected for the chosen ratio, i. e. cis‐Pt(SCF3)Cl(PPh3)2, cis‐Pt(SCF3)2(PPh3)2, and [NMe4][Pt(SCF3)3(PPh3)]. Starting from cis‐PtCl2(MeCN)2 and [NMe4]SCF3 and adding PPh3 after substitution, product mixtures were dominated by the corresponding trans‐isomers. Results of the single crystal structure analyses of cis‐Pt(SCF3)2(PPh3)2 and trans‐Pt(SCF3)Cl(PPh3)2 are discussed.
Morpholin als ambidenter Ligand
Authors: Iravani Effat , Neumüller Bernhard 
Published: December 2005

AbstractMorpholine as Ambident LigandThe reaction of MeInCl2 with Li‐morpholinate [Li(Morph)] at 20 °C in THF gave after work‐up and recrystallization from diglyme the salt [Li(Diglyme){In3Me2Cl4(Morph)4}]·Diglyme (1). The treatment of the reaction mixture of MesInCl2/Li(Morph) with wet THF yield as only isolated compound the coordination polymer [Li6Cl6(HMorph)3] (2). Under similar conditions the reaction of InCl3 with Li(Morph) led after work‐up in wet THF to [Li(Diglyme)2][InCl4(HMorph)2] (3). 1 – 3 were characterized by NMR and IR spectroscopy as well as by X‐ray analysis. According to this, 1 contains the trinuclear anion [In3Me2Cl4(Morph)4]− in which one of the morpholinate ligands is coordinated via N atom to the In3+ ions, while the O atom belongs to the coordination sphere of the Li+ ion. In 2, LiCl forms a hexagonal heteroprismn, in which the morpholine molecules are responsible for a 3d network via coordination of both Lewis‐basic heteroatoms. 3 contains trans‐[InCl4(Hmorph)2]− ions, connected by hydrogen bonding along [011].
Differing Coordination Modes of (O‐Alkyl)‐p‐Ethoxyphenyldithiophosphonato Ligands in Copper(I), Silver(I) and Gold(I) Triphenylphosphine Complexes
Authors: Haiduc Ionel , Mezei Gellert , Micu‐Semeniuc Rodica , Edelmann Frank T. , Fischer Axel 
Published: December 2005

AbstractThe three (O‐methyl)‐p‐ethoxyphenyldithiophosphonato triphenylphosphine complexes of copper, silver and gold, [(Ph3P)nM{S2P(OMe)C6H4OEt‐p}] (M = Cu, n = 2; M = Ag, Au, n = 1) investigated structurally by X‐ray diffraction exhibit remarkable structural differences. The copper compound is a four‐coordinate chelate monomer with Cu–S 2.4417(6) and 2.5048(6) Å; P–Cu–S 104.24(2)–114.01(2)°; Cu–S–P 82.49(3)° and 80.85(2)°. The silver compound is a cyclic dimer with bridging dithiophosphonato ligands and three‐coordinate silver atoms [Ag–S 2.5371(5) and 2.6867(5) Å; P–Ag–S 122.88(2)° and 122.17(2)°; Ag–S–P 89.32(2)° and 103.56(2)°]. The gold compound is monomeric with linear dicoordinate gold [Au–S 2.3218(6) Å; P–Au–S 177.72(2)°, Au–S–P 100.97(3)°].
Hydrothermal Synthesis and Structures of Two New Molybdenum Phosphate Compounds based on Keggin Cluster Units
Authors: Zhang Quan‐Zheng , Lu Can‐Zhong 
Published: December 2005

AbstractTwo new molybdenum phosphate complexes, [Cu2(phen)4(μ‐Cl)][PMo12O40]·H2O (phen = 1,10‐phenanthroline) (1) and (Hbpy)[CuI(bpy)]2[PMoV2MoVI10O39] (bpy = 4,4′‐bipyridine) (2), have been prepared under mild hydrothermal conditions and structurally characterized by single‐crystal X‐ray diffraction. Compounds 1 and 2 crystallize in triclinic system, space group ${\rm P}{\bar 1}$, with a = 12.5458(7) Å, b = 13.4486(8) Å, c = 21.2406(12) Å, α = 99.7020(10)°, β = 94.2320(10)°, γ = 95.0890(10)°, V = 3504.2(3) Å3 and Z = 2 for 1, and a = 10.7871(6) Å, b = 10.9016(6) Å, c = 12.7897(7) Å, α = 96.8500(10)°, β = 110.0850(10)°, γ = 103.5800(10)°, V = 1339.74(13) Å3 and Z = 1 for 2. Compound 1 contains a [Cu2(phen)4(μ‐Cl)]3+ cation in which two similar [Cu(phen)2] units are bridged by one chlorine atom. Compound 2 contains one‐dimensional straight chain of Keggin polyoxoanions [PMoV2MoVI10O39]n3− and two linear cationic chains of [CuI(bpy)]nn+. The molecular packing shows a two‐dimensional network, which is formed by the cross of the linear Keggin anions and Cu‐bpy cations.
Synthesen und Strukturen der Titan(III)‐siloxane [Ti(OSiPh3)3(thf)2] und [Ti(OSiPh3)3(py)2]
Authors: Veith Michael , Voigt Thorsten , Huch Volker 
Published: December 2005

AbstractSyntheses and Structures of the Titanium(III) Siloxanes [Ti(OSiPh3)3(thf)2] and [Ti(OSiPh3)3(py)2]The new titaniumtrioxysilanes [Ti(OSiPh3)3(thf)2] (1) and [Ti(OSiPh3)3(py)2] (2) have been obtained from the reaction of titaniumtrichloride with LiOSiPh3 in the presence of the corresponding bases tetrahydrofurane (thf) and pyridine (py). From the crystal structures of both compounds it is evident that the titanium atoms are in the centres of trigonal‐bipyramidal coordination figures, with the donor atoms in axial positions. The compounds 1 and 2 have slightly different structures (mean values: 1: Ti‐O(Si) 1.897(9), Ti‐O(C) 2.136(8) Å; 2: Ti‐O 1.902(9), Ti‐N2.252(8) Å) and have a single absorption band in the visible region of the UV‐spectrum. The exchange of the thf‐ligands in 1 by pyridine (in high molar excess) seems to be hindered as deduced from UV‐spectroscopy.
The Equilibrium Partial Pressure of HgI2 over and Thermodynamic Properties of Hg3Te2I21)
Authors: Hutchins Mark A. , Wiedemeier Heribert 
Published: December 2005

AbstractThe high temperature vaporization pattern of Hg3Te2I2(s,l) shows four distinctly different regimes, similar to those of the HgTe vaporization. The most predominant species in the vapor phase in all four regimes is HgI2(g), followed by Hg(g) and, possibly, Te2I2(g).The width of the “homogeneity range” of Hg3Te2I2(s) was determined to be less than about 0.17 mole‐% HgI2. Applying the second‐law method to the vaporization of HgTe‐saturated Hg3Te2I2(s) at higher temperatures yields the heat and entropy of vaporization of 20.9 ± 2.3 (kcal/mole) and of 27.5 ± 2.8 (cal/mole K), respectively, with estimated total uncertainties of less than ± 5.8 (kcal/mole) and ± 7.6 (cal/mole K), at an average temperature of 722 K. With an estimated heat capacity function of Hg3Te2I2(s) and estimated thermodynamic values for HgI2‐saturated HgTe(s), the heat of formation and absolute entropy of Hg3Te2I2(s) are computed to be ${\rm \Delta}{\rm H}{\rm ^{o}_{298}}_{f}$ = −49.7 ± 1.1 (kcal/mole) and ${\rm \Delta}{\rm H}{\rm ^{o}_{298}}$ = 97.3 ± 1.4 (cal/mole K), with estimated total uncertainties of ± 8.3 (kcal/mole) and ± 14.0 (cal/mole K). The combined results of this investigation provide valuable information for the crystal growth of this material from the vapor and molten phase.
Structural Variations in the Solid‐Solution Series LnxCa2−xAl[Al1+xSi1−xO7] with 0 ≤ x ≤ 1 and Ln = La, Eu, Er
Authors: Peters Lars , Knorr K. , Depmeier W. 
Published: December 2005

AbstractGehlenite, Ca2Al[AlSiO7], has melilite‐type structure with space group $P{\bar 4}{\rm 2}{\rm _{1}}m$. It contains two topologically distinct positions coordinated tetrahedrally by oxygen. One is completely occupied by Al3+, whereas the other one contains Al3+ and Si4+. Normally, the Al3+ molar fraction in the second tetrahedrally coordinated position does not exceed xAl = 0.5, i.e. the so‐called Loewenstein‐rule is obeyed. In this contribution the structural variations in the melilite‐type compounds of the compositions LaxCa2−xAl[Al1+xSi1−xO7], EuxCa2−xAl[Al1+xSi1−xO7] and ErxCa2−xAl[Al1+xSi1−xO7] are discussed. All members of the solid solution except the end‐members violate Loewenstein's rule. Rietveld refinements against X‐ray powder diffraction patterns confirm that the compounds have space group $P{\bar 4}{\rm 2}{\rm _{1}}m$, without changes in the Wyckoff‐positions of the ions compared to gehlenite.
Hochdrucksynthese von BaSr2P6N12 und BaCa2P6N12 und Strukturvergleich der Reihe BaP2N4, BaCa2P6N12 und BaSr2P6N12
Authors: Karau Friedrich , Schnick Wolfgang 
Published: December 2005

AbstractHigh‐Pressure Synthesis of BaSr2P6N12 and BaCa2P6N12 and Comparison of the Structures of BaP2N4, BaCa2P6N12, and BaSr2P6N12The novel nitridophosphates BaCa2P6N12 and BaSr2P6 N12 were obtained by means of high‐pressure high‐temperature synthesis utilizing the multianvil technique (1200 °C, 5 GPa). The complex anion [PN2−] of the title compound is formally isoelectronic with silica. The crystal structure was solved from powder data and refined by the Rietveld method (BaCa2P6N12: $Pa{\bar 3}$, Z = 4, a = 9,9578(2) Å; BaSr2P6N12: $Pa{\bar 3}$, Z = 4, 10,0705(2) Å). The crystal structures are derived from that of BaP2N4 which is isotypic with a high pressure phase of CaB2O4 and BaGa2S4. For each compound the 31P solid state NMR spectrum yielded a single resonance (BaCa2P6N12: 7.4 ppm; BaSr2P6N12:3.9 ppm).
Substituted Ferrocenylboranes – Potential Ligand Precursors for ansa‐ Metallocenes, Constrained Geometry Complexes and ansa‐Diamido Complexes
Authors: Braunschweig Holger , Breitling Frank M. , Kraft Katharina , Kraft Mario , Seeler Fabian , Stellwag Sascha , Radacki Krzysztof 
Published: December 2005

AbstractA wide range of potential ligand precursors and related compounds have been synthesized from ferrocenyldibromoborane and ferrocenylenebis(dibromoborane) via salt elimination reactions. These comprise ligand precursors suitable for the preparation of (i) ansa‐metallocenes such as [FcB(η1‐C5H5)2] (2), [FcB(1‐C9H7)2] (3), [FcB(3‐C9H7)2] (4) and [1,1′‐fc{B(3‐C9H7)2}2] (11), (ii) constrained geometry complexes such as [FcB(1‐C9H7)N(H)Ph] (7) and [FcB(3‐C9H7)N(H)Ph] (8), (iii) ansa‐diamido complexes such as [FcB(N(H)Ph)2] (9) as well as (iv) the related compounds [FcB(Br)N(H)tBu] (5), [FcB(Br)N(H)Ph] (6), [1,1′‐fc{B(Br)N(SiMe3)2}2] (12) and [1,1′‐fc{B(Br)NiPr2}2] (13) (Fc = ferrocenyl, fc = ferrocenylene, C5H5 = cyclopentadienyl, C9H7 = indenyl). All new compounds have been characterised by multinuclear NMR spectroscopic techniques and in the case of 7 and 12 by X‐ray diffraction methods.
Stabilization of Highly Reactive “Naked Anions”: Synthesis, Crystal Structure and Vibrational Spectrum of [Na(12‐crown‐4)2]2 [P2S6] · CH3CN
Authors: Gjikaj Mimoza , Brockner Wolfgang , Adam Arnold 
Published: December 2005

AbstractThe novel thiodiphosphate, [Na(12‐crown‐4)2]2[P2S6] · CH3CN, bis[di(12‐crown‐4)sodium] hexathiodiphosphate(V) acetonitrile solvate (1) has been synthesized by the reaction of Na2[P2S6] with 12‐crown‐4 in dry acetonitrile. The title compound crystallizes in the tetragonal space group P42/mbc (no. 135), with a = 15.184(1) Å, c = 21.406(2) Å and Z = 4 and final R1 = 0.0671 and wR2 = 0.0809. The crystal structure is characterized by discrete sodium‐bound crown‐ether sandwich cations, [Na(12‐crown‐4)2]+ and [P2S6]2− ions with D2h symmetry. Sodium ion is coordinated by the eight oxygen atoms of two crown‐ether molecules to form a square antiprisma. Solvent molecules of CH3CN are statistically disordered. Distances and angles of the [P2S6]2− unit are similar to those in [K(18‐crown‐6)]2 [P2S6] · 2 CH3CN, and in K2[P2S6] and Cs2[P2S6]. The FT‐Raman and FT‐IR spectrum of the title compound has been recorded and interpreted, especially with respect to the P2S6 group and in comparison to the few known metal hexathiodiphosphates(V).
Terminally Dimetallated N,N′‐Dimethylpiperazines with Doubly Spirocyclic Structures
Authors: Tian Xin , Fröhlich Roland , Mitzel Norbert W. 
Published: December 2005

AbstractDilithiated N,N′‐dimethyl‐piperazine, LiCH2N(CH2CH2)2 NCH2Li (2) was prepared by transmetallation of N,N′‐bis(trimethylstannylmethyl)‐piperazine (1) with nBuLi and was isolated as a highly pyrophoric yellowish powder in high yield. Compound 2 was characterized by elemental analysis and was reacted as difunctional aminomethylating reagent with dialkyl‐earth metal chlorides, R2MCl (M = Al, Ga; R = Me, tBu) which resulted in the formation of spirocyclic adducts of N,N′‐bis(dialkylmetallamethyl)‐piperazine and unreacted dialkylmetal chlorides, [(Me2AlCl)Me2AlCH2N(CH2CH2)2NCH2AlMe2(ClAlMe2)] (3) and [(tBu2GaCl)tBu2GaCH2N(CH2CH2)2NCH2GatBu2(ClGatBu2)] (4) with five‐membered rings. Compounds 1, 3 and 4 were identified by NMR‐spectroscopy (1H, 13C, 119Sn for 1, 27Al for 3), mass spectra (EI, for 1) and by crystal structure determinations.
Pr10[Si10−xAlxO9+xN17−x]Cl with x ≈ 1 – an Oxonitridoaluminosilicate Chloride
Authors: Lieb Alexandra , Lauterbach Rainer , Schnick Wolfgang 
Published: December 2005

AbstractThe oxonitridoaluminosilicate chloride Pr10[Si10−xAlxO9+xN17−x]Cl was obtained by the reaction of praseodymium metal, the respective chloride, AlN and Al(OH)3 with “Si(NH)2” in a radiofrequency furnace at temperatures around 1900 °C. The crystal structure was determined by single‐crystal X‐ray diffraction (Pbam, no. 55, Z = 2,a = 10.5973(8) Å, b = 11.1687(6) Å, c = 11.6179(7) Å, R1 = 0.0337). The sialon crystallizes isotypically to the oxonitridosilicate halides Ce10[Si10O9N17]Br, Nd10[Si10O9N17]Br and Nd10[Si10O9N17]Cl, which represent a new layered structure type. The structure refinement was performed utilizing an O/N‐distribution model according to Paulings rules, i.e. nitrogen was positioned on all bridging sites and mixed O/Noccupation was assumed on the terminal sites resulting in charge neutrality of the compounds. The Si and Al atoms were refined equally distributed on their three crystallographic sites, due to their poor distinguishability by X‐ray analysis. The tetrahedra layers of the structure consist of condensed [(Si,Al)N2(O,N)2] and [(Si,Al)N3(O,N)] tetrahedra of Q2 and Q3 type. The chemical composition of the compound was derived from electron probe micro analyses (EPMA).
Unusual Coordination Modes of Tris(pyrazol‐1‐yl)borates: Synthesis and Solid State Structures of Sodium[(dimethylamino)tris(pyrazol‐1‐yl)borate], Potassium[(dimethylamino)tris(pyrazol‐1‐yl)borate], and Potassium[phenyltris(pyrazol‐1‐yl)borate]
Authors: Bieller Susanne , Bolte Michael , Lerner Hans‐Wolfram , Wagner Matthias 
Published: December 2005

AbstractWe report the optimized syntheses and the solid state structures of the alkali metal tris(pyrazol‐1‐yl)borates M[Me2NBpz3] (M = Na+ (1), K+ (2); pz = pyrazol‐1‐yl) and K[PhBpz3] (3). Even though 1 and 2 consist of polymeric chains in the solid state, it is possible to identify subunits where the [Me2NBpz3]− ion acts as tridentate ligand towards Na+ and K+ and binds via two of its pyrazolyl rings and its dimethylamino nitrogen atom (κ3Npz,Npz,NNMe). In 3, the ligand [PhBpz3]− employs two pyrazolyl donors and the π‐face of its phenyl substituent for potassium coordination (κ3N,N,C).
Synthesis and Characterization of Two Open‐Framework Germanates containing Double Four‐Ring Building Units
Authors: Lin Zhi‐En , Zheng Shou‐Tian , Yang Guo‐Yu 
Published: December 2005

AbstractTwo new organically templated germanates, [GeO2]10·C2N2H8·H2O (1) and [GeO2]10·C3N2H10·H2O (2) have been synthesized under solvothermal conditions. The two compounds are isostructural and have three‐dimensional open‐framework architectures built up from Ge8O20 double four‐ring units and GeO4 tetrahedra. These building units are connected in such a way that they form a zeolite‐like porous framework with large 12‐ring channels along the [001] direction, where the organic amines reside.
Re‐evaluation of the X‐ray Crystal Structure of [Ta4F20] and the Synthesis and Characterization of a Series of Mixed‐Metal Pentafluorides of Niobium and Tantalum
Authors: Brewer Stuart A. , Brisdon Alan K. , Fawcett John , Holliman Peter J. , Holloway John H. , Hope Eric G. , Russell David R. 
Published: December 2005

AbstractThe direct fluorination of intimately mixed niobium and tantalum powders gives a range of mixed‐metal pentafluorides [NbxTa4‐xF20] (x = 1 2, 2 3, 3 4) as discreet species isostructural with tantalum pentafluoride (x = 0 1). The crystal structures of 1–4 are indistinguishable by X‐ray crystallography. Complex 1 crystallizes in the monoclinic space group C2/m with a = 9.5462(13), b = 14.3578(19), c = 5.0174(7) Å, β = 97.086(2)°, Z = 2. The geometry about the tantalum atom is distorted octahedral with 2 short and 2 slightly longer Ta‐Fterminal, and 2 Ta‐Fbridging distances. The angles at the bridging fluorine atoms are 172.9(5)°.
Cyanidverbrückte Koordinationspolymere aus cis‐ oder trans‐[Ru(tBuNC)4(CN)2] und MnCl2: Zum Einfluß unterschiedlicher Topologien auf die magnetischen Eigenschaften von Materialien
Authors: Halbauer Kathi , Leibeling Guido , Imhof Wolfgang 
Published: December 2005

AbstractCyanide Bridged Coordination Polymers from cis‐ or trans‐[Ru(tBuNC)4(CN)2] and MnCl2: About the Influence of Different Topologies on the Magnetic Properties of MaterialsThe reaction of cis‐ or trans‐[Ru(tBuNC)4(CN)2] with MnCl2 as an additional transition metal fragment yields the one dimensional coordination polymers {cis‐[Ru(CN)2(tBuNC)4] MnCl2}n, (1), and {trans‐[Ru(CN)2(tBuNC)4]MnCl2}n, (2), with a different arrangement of the metal centers caused by the different stereochemistry of the starting compounds. The variation of the Ru‐C‐N‐Mn geometry nevertheless leads to significant differences in the magnetic properties of 1 and 2. The coordination polymer derived from trans‐[Ru(tBuNC)4(CN)2] shows a more efficient antiferromagnetic intrachain interaction between the manganese centers compared to the cis‐derivative.