bluuebunny/crossref_metadata_2025_split huggingface dataset:
Strukturen ladungsgestörter oder räumlich überfüllter Moleküle, 80 [1 - 3] Strukturänderungen von p-Benzochinon durch Donator- und Akzeptor-Substituenten
Authors: Bock Hans , Nick Sabine , Seitz Wolfgang , Näther Christian , Bats Jan W. 
Published: February 2015

Abstract
The structures of seven di- or tetrasubstituted p-benzoquinone derivatives O=C(XC=CH )2C=O and O=C(XC=CX)2C=O with substituents X = -OCH3, -N(CH2)5, - N(CH2CH2)2O, -Cl, -CN and -⊕N(HC=CH)2C-N(CH3)2 are presented and discussed in comparison with published ones substituted by X = -Si(CH3)3, -C6H5, -N(CH3)2, -⊕N(HC=CH)2CN(CH3)2, -O⊖ , and - NO2. Based on the introduction, in which halfwave-reduction potentials, geometry-optimized quantum-chemical calculations on substituent perturbation and known structural data of p-benzoquinone derivatives are used to characterize their molecular ground states. The structural changes indicate how substituent perturbations might be rationalized. Of the categories defined - imperturbed, donor, donor/acceptor and acceptor perturbed - the donorsubstituted p-benzoquinones do exhibit the largest differences, often called cyanine distorsion. In very satisfactory agreement with extensive semiempirical calculations, all effects determined experimentally are discussed in terms of varying charge distribution. With respect to the biochemical importance of p-benzoquinone derivatives, this first structural summary points out important facets.
Nickelkomplexe mit Thioether-Chelatliganden: Elektrochemische Eigenschaften und Kristallstrukturen von [Ni(MeSCH2CH2SMe)2 (NCS)2], [Ni(EtSCH2CH2SEt)2(NCS)2] und [Ni(MeSCH2CH2SMe)2Br2]
Authors: Köckerling Martin , Henkel Gerald 
Published: February 2015

Abstract
Current interest in nickel complexes with sulfur donor ligands as models for the active sites of nickel-containing hydrogenases has prompted us to investigate the structural and electrochemical behaviour of nickel complexes with bifunctional thioether ligands. Crystals of [Ni(MeSCH2CH2SMe)2(NCS)2] (1) and [Ni(EtSCH2CH2SEt)2(NCS)2], (2) are triclinic, space group Pī, Z = 1, 1: a = 7.293(3) Å, b = 7.567(3) Å, c = 8.784(3) Å, α = 72.81(3)°, β = 78.41(3)°, γ = 85.14(3)°; 2: a = 8.611(1) Å, b = 8.101(1) Å, c = 9.163(1) ßrbÅ, α = 66.54(1)°, β = 76.19(1)°, γ = 67.88(1 )ßrb°. [Ni(MeSCH2CH2SMe)2Br2] (3) crystallizes in the monoclinic space group P21/n, a = 6.757(2) A, b = 7.881(2) Å, c = 14.674(4) Å, β = 94.05(2)°, Z = 2. In crystals of 1, 2 and 3 mononuclear neutral complex molecules are observed which have pseudo-octahedral trans-NiS4L2 coordination sites. The cyclovoltammograms of 1 and 3 in MeCN (Ag/AgCl/KCl, 3 mol/l) show only irreversible oxidation waves at +837 mV for 1 and +846 mV for 3, respectively, which are characteristic features of NCS⊖ and Br⊖ ions. In addition, a reduction wave at +393 mV is observed in 3. No redox response is found in the potential region between -700 and +100 mV which is used by the NiFe hydrogenase enzymes.
Zur Kristallchemie von CuDyMo2O8 und CuYbMo2O8
Authors: Müller-Buschbaum Hk. , Gallinat St. 
Published: February 2015

Abstract
Single crystals of (I) CuDyMo2O8 and (II) CuYbMo2O8 have been prepared by crystalli­sation from melts. Both com pounds crystallize with orthorhombic symmetry, space group D15
2h-Pbca with (I): a = 10.195(1), b = 9.721(2), c = 14.563(3); (II): a = 10.094(6), b = 9.628(9), c = 14.467(8) Å, Z = 8. The crystal structure is characterized by a triangular CuO3-polygon, a square antiprismatic coordination around the Rare Earth ions and the typical Mo O4 tetra­ hedra.
Preparation and Crystal Structure of the Isotypic Carbides Ln3.67TC6 (Ln = rare earth elements; T = Mn, Fe, Ru) and Eu3,16NiC6
Authors: Witte Anne M. , Jeitschko Wolfgang 
Published: February 2015

Abstract
The 14 carbides Ln3.67MnC6 (Ln = La-Nd) and Ln3.67TC6 (Ln = La-Nd, Sm; T = Fe, Ru) were prepared from the elemental components by arc-melting and subsequent annealing. Eu3.16NiC6 was obtained from a lithium flux. The crystal structures of these nearly isotypic, hexagonal compounds (P63/m, Z = 2) were determined from single-crystal X-ray data; La3.67- FeC6: a = 878.7(2), c = 535.1(1) pm, R = 0.052 for 548 structure factors and 25 variable parameters; Eu3.16NiC6: a -860.0(1), c = 548.2(2) pm, R = 0.015 for 606 structure factors and 25 variables. The structures differ from the previously reported Gd3Mn2C6 structure by the occupancy of one manganese position by rare earth atoms. Since the lanthanum atoms are larger than the manganese atoms, only two thirds of these manganese positions can be occupied by the lanthanum atoms in La3.67FeC6. Eu3.16NiC6 has similar atomic positions. The C-C bond distances in the C2 pairs are 130(2) and 126.5(5) pm in the La and Eu compounds, respectively. Magnetic susceptibility measurements with a SQUID magnetometer indicate La3.67FeC6 to be Pauli paramagnetic. A test for superconductivity was negative down to 3 K.
Bis(triphenylphosphoniumyIidyl)phosphane
Authors: Jochem G. , Schmidpeter A. , Nöth H. 
Published: February 2015

Abstract
Bis(ylidyl)phosphanes can be prepared from ylides and dichlorophosphanes or from bis-(ylidyl)phosphenium chlorides and organolithium compounds. By substituting in bis(ylidyl)-phosphenium chlorides the chloride ion for more basic anions, a large variety of bis(ylidyl)-phosphanes is accessible. They can be protonated at the ylidic carbon atoms, but alkylated and oxidized at the central phosphorus atom. As shown by 31P NM R in solution and by X-ray investigation of the crystal, the lone pair at the tervalent phosphorus is generally oriented synperiplanar to both phosphonio groups.
Liquid Crystalline Compounds in the Thiophene Series, Part 12+ Synthesis and Characterization of Side Chain Polysiloxanes with Low Transition Temperatures
Authors: Koßmehl Gerhard , Labahn Bettina 
Published: February 2015

Abstract
Polysiloxanes as side chain polymers containing the 2.2′-bithiophene unit, hexyl and octyl terminal groups and spacer units with 3, 5. 6 and 10 methylene groups were prepared and characterized. These polymers have monotropic liquid crystalline phases with transition tem ­ peratures below 0 °C (e. g. for polymer 6p: isotropic → liquid crystalline transition: -20 °C; liquid crystalline → solid transition: -43 °C). Polymers with a trimethylene spacer group must contain an octyl terminal group for forming liquid crystalline phase; a hexyl group does not form such a phase.
Synthese und [4+2]-Cycloadditionen von 4a, 8a-Methanophthalazin, das erste Propellan mit einem elektronenreichen und einem elektronenarmen 4π-Diensystem/Synthesis and [4+2] Cycloaddition Reactions of 4a, 8a-Methanophthalazine, the First Propellane with an Electronrich and an Electrondeficient 4π-Diene System
Authors: Laue Jörg , Seitz Gunther , Waßmuth Hans 
Published: February 2015

Abstract
Cyclopropabenzene 3 reacts with 3,6-bis(trifluoro)-1,2,4,5-tetrazine 4 to afford in high yield the 4a,8a-methanophthalazine 6, the first propellane, containing an electron rich cyclohexadiene system on the one hand and an electron deficient diazadiene system on the other hand. According to the principle of Diels-Alder reactions with inverse electron demand, electron rich dienophiles like ketene acetals, enamines or dimethyl hydrazones react predominantly with the diazadiene system to yield the azo-bridged cycoadducts of type 19 and/or the tricyclic tetrahydropyridazines like 20. In the same fashion several more or less angle strained cycloalkenes cycloadd to the diazadiene of the propellane 6 to give the novel polycyclic azo compounds 34, 36, 38,40, 42 and 44 with exo-configuration of the annulated cycloalkanes. Attack apparently occurs from less hindered face anti to the methano bridge of 6 with high stereo-and site-selectivity. As anticipated the electron deficient dienophiles 1,2,4-triazoline-3,5-dione 45 and the benzoquinone 46 add with different site selectiviy to 6 furnishing the polycyclic pyridazines 47 and 48 resp. again by exclusive anti attack. Treatment of 6 with both an electron rich and an electron deficient dienophile like 49 and 45 resp. affords the heptacyclic anti-anti-bis adduct 51 with analogously high site-and stereoselectivity.
Darstellung, 11B-, 13C-, 1H-NMR- und Schwingungsspektren von μ-Dimethylen-bis-hexahydro-closo-hexaborat, [B6H6(CH2)2B6H6]2-, sowie Kristallstrukturen von [As(C6H5)4]2[B6H6(CH2)2B6H6]·[(CH3)2CO] und [P(C6H5)4]2[B6H6(CH2)2B6H6]·[C2H5OH]/Preparation, 11B , 13C, 1H NMR and Vibrational Spectra of μ-Dimethylene-bis-hexahydro-closo-hexaborate, [B6H6(CH2)2B6H6]2- , and the Crystal Structures of [As(C6H5)4]2[B6H6(CH2)2B6H6]·[(CH3)2CO] and [P(C6H5)4]2[B6H6(CH2)2B6H6]·[C2H5OH]
Authors: Lübbe W. , Preetz W. 
Published: February 2015

Abstract
By reaction of [B6H6]2- with dibromoethane in acetonitrile μ-dimethylene-bis-hexahydro-closo-hexaborate(2-), [B6H6(CH2)2B6H6]2-, is formed. The compound was separated from excess [B6H6]2- by ion exchange chromatography on diethylaminoethyl cellulose. The crystal structures of [As(C6H5)4]2[B6H6(CH2)2B6H6]·[(CH3)2CO] (I) and [P(C6H5)4]2[B6H6(CH2)2B6H6]·[C2H5OH] (II) have been determined by single crystal X-ray analysis: I is triclinic, space group P1̄ with a = 10.264(2), b = 13.804(2) and c = 20.242(2) Å, α = 97.857(10)°, β = 92.734( 11)° and γ = 103.024( 13)°; II is monoclinic, space group P21/n with a = 12.742(2), b = 7.532(2) and c = 26.887(3) Å, β = 95.765( 10)°. The 11B NMR spectrum of this compound reveals the feature of monosubstituted octahedral B6 cages. The 13C NMR spectrum exhibits a triplet at 16.20 ppm with 1J(C,H) = 120.4 Hz. In the 1H NMR spectrum a singulet at 0.72 ppm of the CH2-groups and two singulets at 1.72 and -4.95 ppm of the BH fragments are observed. The IR and Raman spectra exhibit strong CH stretching bands between 2908 and 2789 cm-1, BH stretching bands between 2463 and 2396 cm-1, and the BC stretching vibration at 1144 in the IR and at 1150 cm-1 in the Raman spectrum.
Synthese und Dimerisierungsverhalten des 1,1-Bis(trimethylsilyl)-2-(2,5-diisopropylphenyl)silens/ Synthesis and Dimerization Behavior of 1,1 -Bis(trimethylsilyl)-2-(2,5-diisopropylphenyl)silene
Authors: Hoffmann Douglas , Reinke Helmut , Oehme Hartmut 
Published: February 2015

Abstract
Tris(trimethylsilyl)silylmagnesium bromide, (Me3Si)3SiMgBr, reacts with 2.5-diisopropylbenzaldehyde to give 2,5-diisopropylphenyl-tris(trimethylsilyl)silylmethanol (1). With sodium hydride in THF compound 1 undergoes a rearrangement through 1,3-Si,O-trimethylsilyl migration affording bis(trimethylsilyl)silyl-(2,5-diisopropylphenyl)-trimethylsiloxy-methane (4). The deprotonation of 1 with organolithium reagents in ether leads to the elimination of lithium trimethylsilanolate according to a modified Peterson mechanism resulting in the formation of the transient silene (Me3Si)2Si=CH(2,5-iPr2C6H3) (2). Treatment of 1 with an excess of phenyllithium in diethylether at low temperature gives 1,1,1,3,3,3-hexamethyl-2- phenyl-2-(2,5-diisopropylbenzyl)-trisilane (3), formed in a nucleophilic addition of the excess PhLi to the silene intermediate and in the hydrolytic workup. Stochiometric quantities of MeLi in diethylether at -78 °C convert compound 1 into a head-to-head dimer of the silene 1,2,3,8a-tetrahydro-5,8-diisopropyl-1 -(2,5-diisopropylphenyl)-2,2,3,3-tetrakis-(trimethylsilyl)- 2,3-disilanaphthalene (5). Compound 5, presumably the kinetically preferred product of the cyclodimerization of 2, gradually transforms into the thermodynamically stable 3,4-bis(2,5- diisopropylphenyl)-1, 1,2,2-tetrakis(trimethyl-silyl)-1,2-disilacyclobutane (6). The E/Z-isomers of 6 have been characterized by X-ray crystal structural analyses.
Verknüpfung koordinativ ungesättigter Kupfer(II)-Monomere via Cyano-versus Tetrazolyl-Donor/ Linkage of Coordinatively Unsaturated Copper(II) Monomers via Cyano versus Tetrazolyl Donor
Authors: Saalfrank Rolf W. , Harbig Roland , Struck Oliver , Peters Eva-Maria , Schnering Hans Georg von 
Published: February 2015

Abstract
Reaction of a methanolic copper(II) acetate solution with tetrazolyl enol derivatives 2a (HL2) or 2b (HL3) leads to the formation of the corresponding 2D-coordination polymers 4 (∞
2 [CuL2
2]) and 5 (∞
2 [CuL2
3]), respectively. Single-crystal X-ray diffraction of the supramolecular species 4 and 5 established unequivocally the structures of the regioisomeric coordination polymers. On the contrary, reactions of 2c (HL4) with methanolic copper(II) acetate solution and 2b (HL3) with methanolic zinc(II) acetate solution yield mononuclear chelate complexes 11 ([CuL4
2]) and 12 ([ZnL23(MeOH)2]). The structures of 11 and 12 have been established by X-ray structure analysis.
Vinamidinium-Salze als Nucleophile Vinamidinium Salts as Nucleophiles
Authors: Möhrle H. , Lieck-Waldheim U. von der 
Published: February 2015

Abstract
2,3-Dihydro-1,4-diazepinium salts could not be aminomethylated with conventional methods, but the hydrochlorides produced with methyleniminium salts the C-Mannich-compounds. The reactivity of the substrate was mainly controlled by electronic effects of the substituents. Aminomethylation of 1,5-diazapentadienium salts occurred only if the conformations caused no steric hindrance of the β-C-atom. Methyl substituted 2,3-dihydro-1,4-diazepinium salts reacted with 1,3,5 triazine to pyrimidine anellated derivatives.
The Crystal Structure of β-CsIO4, the Room-Temperature Modification of Cesium Periodate
Authors: Waal Danita de , Zabel Manfred , Range Klaus-Jürgen 
Published: February 2015

Abstract
The crystal structure of β-CsIO4, the room-temperature modification of cesium periodate, was determined as orthorhombic, space group Pnma, with a = 5.8644(5), b = 6.0326(4), c = 14.379(1) A and Z = 4.
The structure was refined to R1= 0.0309, wR2 = 0.0701 for 425 absorption-corrected reflections. β-CsIO4 is isostructural with β-CsReO4. The structure comprises isolated IO4 tetrahedra, linked together by Cs ions. The average I-O dis­tance was found to be 1.747 Å .
Synthese und Kristallstruktur des Barium -Kupfer-Tellurit-Tellurats BaCuTeO3TeO4 / Synthesis and Crystal Structure of the Barium Copper Tellurite-Tellurate BaCuTeO3TeO4
Authors: Sedello O. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of BaCuTeO3TeO4 have been prepared by crystallisation from melts. X-ray investigations lead to orthorhombic symmetry, space group C16
2v-Ama2, a = 5.4869(8), b = 15.412(1), c = 7.2066(4) Å , Z = 4. This compound represents a new structure type, containing BaO10, CuO5, TeO6 and TeO4 polyhedra. The lone pair (E) of TeIV completes the TeIVO4 polyhedron to a trigonal TeO4E bipyramid. The Te to E distance is estimated by calculations of the Coulomb terms of lattice energy to 1.43 Å .
Eine silberhaltige Phase eines Oxoruthenats: Ag0,4 (Na2,3Ca4,3RuO8 / A Silver Containing Phase of an Oxoruthenate: Ag0,4Na2,3Ca4,3RuO8
Authors: Frenzen S. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of Ag0.4Na2.3Ca4.3RuO8 have been prepared by heating Na2O2, CaO and ruthenium in closed silver tubes. Silver took part in the reaction. The crystal structure was investigated by X-ray techniques. AgO4Na2.3Ca4.3RuO8 crystallizes with orthorhombic symmetry, space group D19
2h-Cmmm ; a = 9.255(1), b = 6.683(1), c = 6.696(3) Å , Z = 2. It shows relations to the sodium chloride structure. A statistical distribution of Ag+ and Na+ can be separated in micro space by splitting one oxygen position to give a dumb-bell like O-Ag-O and an octahedral NaO6 coordination.
Kristallstrukturuntersuchung am Barium-Yanadyl-Vanadat: Ba2(VO)V2O8 / Crystal Structure Investigation of the Barium Vanadyl-Vanadate: Ba2(VO)V2O8
Authors: Feldmann J. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of Ba2(VO)V2O8 have been prepared by solid state reactions of Ba2V2O7, V2O3 and V2O5 in sealed silica tubes. This compound crystallizes with monoclinic symmetry, space group C2
2 -P21, a = 8.1174(9), b = 5.9699(9), c = 9.2903(9) Å , β = 113.94(1)°, Z = 2. V 5+ shows tetrahedral coordination. V 4+ inside 1
∞ [V (3)O4] chains is characterized by a square pyramidal coordination with a short apical V-O distance of 1.6 Å typically for vanadyl groups. Ba2(VO)V2O8 represents a new structure type and is not isotypic to Sr2(VO)V2O8.
Zweidimensionales Eis und H5O2
+-Ionen. Zur Bildung und Struktur tiefschmelzender molekularer und ionischer Hemi-bis Hexahydrate halogenierter Essigsäuren CClnF3-nCOOH (n = 1 bis 3) [1] / Two-Dimensional Ice and H5O2
+ Ions. On Formation and Structure of Low-Melting Molecular and Ionic Hemi-through Hexahydrates of Haloacetic Acids CClnF3-nCOOH (n = 1 to 3) [1]
Authors: Dahlems Thomas , Mootz Dietrich , Schilling Michaela 
Published: February 2015

Abstract
Hydrate formation of haloacetic acids CClnF3-nCOOH (n = 1, 2, 3) has been studied by DTA and temperature-dependent X-ray powder diffraction, and evidence obtained for five phases, all melting at temperatures below ambient. The hydrates have been confirmed and further characterized by their crystal structures at -150 °C. Three lower hydrates, CCl2FCOOH· 0.5H2O (space group P21/c and Z = 8 formula unites per unit cell), CClF2COOHH2O (P21/c, Z = 4), and CClF2COOH ·4H2O (P1̄, Z = 2), have molecular structures with the acid and water molecules hydrogen-bonded in two-dimensional arrays. The structures of the remaining hydrates, CCl2FCOOH·6H2O and CCl3COOH · 6H2O (similar, but not isotypic, both P1̄ and Z = 2), are ionic, as (H5O2
+)(CX3COO-) · 4H2O , and three-dimensional. The neutral water molecules are hydrogen-bonded in ice-like layers rare in crystal chemistry. Also, CCl2FCOOH is established only as the second acid of which a lower hydrate is molecular and a higher one ionic.
Hydrolyse von Trifluoracetylaceton-salicylhydrazon / Hydrolysis of Trifluoroacetylacetone Salicylhydrazone
Authors: Kraudelt Heide , Ludwig Eberhard , Schilde Uwe , Uhlemann Erhard 
Published: February 2015

Abstract
The reaction of trifluoroacetylacetone with salicylhydrazone gives acetone salicylhydra­ zone besides the expected trifluoroacetylacetone salicylhydrazone. The resulting mixture was analyzed by mass spectroscopy. The structure of acetone salicylhydrazone was determined by X-ray analysis. Crystal data: a = 12,8493(12) Å, b = 6,1084(8) Å, c = 12,757(3) Å; space group Pna21; Z = 4; R = 0,051 ; 750 unique reflexions.
CsNaTe - Darstellung und Charakterisierung von Cäsiumnatriumtellurid / CsNaTe - Preparation and Characterization of Cesium Sodium Telluride
Authors: Fischer Karsten , Feldbaum-Möller Elisabeth , Vogt Petra , Winter Volker , Sabrowsky Horst 
Published: February 2015

Abstract
The dark green compound CsNaTe has been prepared. The characterization by X-ray powder methods leads to a tetragonal lattice (P4/nmm) with a = 530.8 (4), c = 853.2 (1) pm and Z = 2. The structure ist related to the PbFCl structure type.
Optische Absorption der Auride M3AuO ( M = K, Rb, Cs) / Optical Absorption of the Aurides M3AuO (M = K, Rb, Cs)
Authors: Feldmann Claus , Jansen Martin 
Published: February 2015

Abstract
The optical absorption of the aurides M3AuO (M = K, Rb, Cs) and CsAu has been determ inated by UV/VIS spectroscopy. The band gaps have been found to be 2,35(2) eV (Cs3AuO) and 2,30(2) eV (CsAu). This corresponds to a more pronounced anionic character of gold in Cs3AuO as compared to CsAu. In the case of K3AuO and Rb3AuO no band gap was detectable.
Notizen: Hochdrucksynthese und Einkristall-Strukturverfeinerung von Calciumaurat(III), CaAu2O4 / High Pressure Synthesis and Single-Crystal Structure Refinement of Calcium Aurate (III), CaAu2O4
Authors: Louzikova Anja , Range Klaus-Jürgen 
Published: February 2015

Single crystals of calcium aurate(III), CaAu2O4, were obtained by high-pressure treatment of a CaO/Au2O3/KO2 mixture at 40 kbar, 1200 °C in a modified Belt-type apparatus. The crystals are tetragonal, space group I41/a, with a = 5.9868(7), c = 10.043(1) Å, c/a = 1.678 and Z = 4.
CaAu2O4 is isostructural with LaPd2O4, SrAu2O4 and BaAu2O4. Its structure comprises square-planar AuO4 groups (< Au-O > = 2.007 Å), which are stacked into columns along [100] and [010], These columns are connected by shared corners forming a three-dimensional framework. The Ca ions are situated in tunnels created by the gold-oxygen partial structure. They are surrounded by eight oxygen atoms (<Ca-O> = 2.490 Å) in a slightly distorted dodecahedron.
Polynuclear Gold Complexes of the Carbodiimide Unit [N=C=N]2-
Authors: Schneider W. , Angermaier K. , Schmidbaur H. 
Published: February 2015

Abstract
The reaction of N,N′-bis(trimethylsilyl)carbodiimide with equimolar quantities of tris[(triphenylphosphine)gold]oxonium tetrafluoroborate in dichloromethane at -40°C gives high yields of a trinuclear complex {[(Ph3P)Au]2NCN[Au(PPh3)]}+ BF4
-(1). According to variable temperature NMR data the cation is fluxional in solution with a rapid site exchange of the [(Ph3P)Au] units, but has an unsymmetrical (N,N,N′) low temperature ground state configuration. A single crystal X-ray diffraction study has shown that in the crystal lattice these cations are associated further into cyclic, hexanuclear dimers through two short head-to-tail Au-Au contacts (auriophilicity). Treatment of complex 1 with one equivalent of [(Ph3P)Au]+ BF4
- in tetrahydrofuran affords a tetranuclear complex {[(Ph3P)Au]2NCN[Au(PPh3)]2}2+ 2BF4
- (2). The ambient temperature NMR spectra of 2 suggest a fluxional, pseudo-symmetrical structure, but at low temperature a set of three 31P signals (1:2:3 intensity) indicates an aggregation into higher nuclearity species with non-equivalent [Au(PPh3)] units
Zur Kristallchemie eines Natrium-Cadmium-Oxoiridats: Na3Cd2IrO6 / On the Crystal Chemistry of a Sodium Cadmium Oxoiridate: Na3Cd2IrO6
Authors: Frenzen S. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of Na3Cd2IrO6 have been prepared by crystallization from melts in closed silver tubes. The crystal structure was investigated by X-ray techniques. Na3Cd2IrO6, crystallizes with monoclinic symmetry, space group C3
2h-C2/m; a = 5.663(2), b = 9.783(3), c = 5.689(2) Å, β = 109.95(2)°, Z = 2. It is isotypic to M+
5A7+O6 (M = Li, Na; A = Re, Os) and shows relations to the sodium chloride structure in spite of an ordered distribution of Na+, Cd2+ and Ir5+
Die Kristallstrukturen der Eisen- und Cobalt-Hexacyanokomplexe Rb2LiM(CN)6 und Rb2NaM(CN)6 / The Crystal Structures of the Iron- and Cobalt-Hexacyanocomplexes Rb2LiM(CN)6 and Rb2NaM(CN)6
Authors: Peschel Stefan , Paulus Werner , Babel Dietrich 
Published: February 2015

Abstract
The crystal structures of four isotypic cyano complexes, belonging to the monoclinic type of cryolite (P21/n, Z = 2), were determined by single crystal X-ray methods and in one case also by neutron diffraction: Rb2LiFe(CN)6 (a = 717.3, b = 748.0, c = 1030.2 pm, β = 90.24°; Fe - C = 193.6, C - N = 114.5, Li - N = 227.0 pm), Rb,NaFe(CN)6 (a = 724.5, b = 772.5, c = 1055.2 pm, β = 90.39°; Fe - C = 193.9, C - N = 114.2, Na - N = 250.4 pm), Rb,LiCo(CN)6 (a = 715.5, b = 741.2, c = 1025.0 pm, β = 90.14°; Co - C = 189.6, C - N = 114.3, Li - N = 226.9 pm), Rb2NaCo(CN)6 (a = 722.5, b = 766.3, c = 1049.2 pm, β = 90.33°; Co - C = 189.9 (188.8), C - N = 113.4 (7/5.5), Na - N = 250.6 (249.6 pm). The irregular [RbN8l coordination polyhedra exhibit average distances close to Rb - N = 336 pm. Details are discussed and the results compared with those of related compounds