bluuebunny/crossref_metadata_2025_split huggingface dataset:
Notizen: Supplements to Enumeration of Benzenoid and Coronoid Hydrocarbons
Authors: Wenjie He , Wenchen He , Qixiang Wang , Brunvoll J. , Cyvin S. J. 
Published: February 2015

Abstract
The previous report on enumeration and classification of benzenoids and coronoids is supplemented. Perhaps the most significant contribution is the enumeration of benzenoids with 12 hexagons.
The Triply Determined Substitution Structure of 1,3,4-Thiadiazole by DRM Microwave Spectroscopy
Authors: Stiefvater Otto L. 
Published: February 2015

Double Resonance Modulation (DRM) microwave spectroscopy has allowed the determination of the complete substitution structure of normal, mono-deuterated and perdeuterated 1,3.4-thiadiazole (N2C2H2S). The shift of the centre of gravity between the normal and the d2-form and the swing of inertia! axes relative to the C2v symmetrical forms in the 2-d1-species have been used to revise the small coordinates of hydrogen and deuterium atoms.
Bond lengths (in Å) and bond angles (in degrees), with uncertainties covering all three molecular forms, are found as follows:

The results suggest that the shift and the swing of inertial axes between different ‘parent’ forms, which can both be determined from the moments of multiply substituted molecular isotopes, may be used with advantage to refine the position of near-axis atoms.
Higher Order Modes as Accuracy Limiting Factor in Permittivity Measurements of High Lossy Fluids Using Transmission Techniques in the GHz Range
Authors: Redhardt A. , Steinhoff H.-J. , Schütter J. , Neumann H.-J. , Hess G. 
Published: February 2015

Abstract
The higher order mode distortion in measuring dielectric constants on high lossy, high permittivity liquids in the GHz range is investigated by a simulation procedure as well as by experiment. For this, a homodyne method for measuring ε* is introduced in analogy to precision EPR-work.
Crystalline and Liquid Phases in the Systems MeX2/Aniline/Water (Me-Ni,Co;X=NO,ClO4)
Authors: Mahr Michacl , Paulus Helmut , Weil Konrad G. 
Published: February 2015

Abstract
Nickel nitrate, nickel Perchlorate and cobalt nitrate can form homogeneous liquid phases with aniline and water. The shapes of the single phase regions in the ternary phase diagrams were determined. Five types of crystals were obtained in the system nickel nitrate/aniline/water. The structures of Ni(NO3)2 · 6C6H7N · 2H2O, Ni(NO3)2 ·4C6H7N · 2H2O , and Ni(NO3)2 ·2C6H7N · 4H2O have been determined by single crystal X-ray diffraction. All structures show chains of nickel ions and nitrate ions connected by water or aniline molecules. They can be interpreted as one dimensional ion pairs.
Confirmation of the Electric Field Gradients at the Nitrogen Nuclei in N-Cyanomethanimine, CH2NCN, from Low-J Rotational Transitions
Authors: Stolze W. H. , Sutter D. H. , Wentrup C. 
Published: February 2015

Abstract
The results of a high resolution microwave study of low-J rotational transitions of N-cyano-methanimine are reported. The 14N quadrupole coupling constants fitted to the observed hyper­ fine splittings are:χaa (imine) = 2.032(9) MHz, χbb(imine) = -4.586(7) MHz, and / χaa(nitrile) = -3.254(8) MHz, χbb(nitrile) = 0.844(16) MHz. Knowledge of these constants together with the rotational constants and centrifugal distortion constants determined earlier provides the basis for accurate prediction of hitherto unmeasured rotational transitions for radioastronomy.
Die Änderung des elektrischen Widerstands bei der reversiblen Reaktion GdBrHx
GdBrH2 (0.67 <̳ x <̳ 1.0) / The Change of Electrical Resistivity during the Reversible Reaction GdBrHx <
GdBrH2 (0.67<̳ x<̳ 1.0)
Authors: Bauhofer W. , Mattausch Hj. , Simon A. 
Published: February 2015

Abstract
The electrical resistivity of GdBrHx (0.67 <̳ x <̳ 1.0) and GdBrH2, has been measured as a function of temperature and environment (H2, vacuum). A two-electrode dc method and a contactless microwave technique were used. Both methods indicate a metal-to-semiconductor transition for the reaction GdBrHx

GdBrH2.
14N Quadrupole Coupling in the Rotational Spectra of Cyclopropylamine and Cyclopropyl Cyanide
Authors: Böttcher Olaf , Heineking Nils , Sutter Dieter Hermann 
Published: February 2015

Abstract
The 14N hyperfine structure in the rotational spectra of cyclopropylamine and cyclopropyl cyanide has been reinvestigated by microwave Fourier transform spectroscopy. The observed quadrupole coupling constants in units of MHz are: Xaa = 2.3338(18), Xbb = 1.7874(20), Xcc = −4.1209(20) for cyclopropylamine and Xaa = −3.4536(35), Xbb= 1.7468(51), Xcc= 1.7068(51) for cyclopropyl cyanide.
The Rotational Zeeman Effect of 1,2,4-Trifluorobenzene
Authors: Stolze W. H. , Sutter D. H. 
Published: February 2015

Abstract
The rotational Zeeman effect of 1,2,4-trifluorobenzene has been studied for 8 low-J rotational transitions in magnetic fields between 1.9 and 2.4 Tesla. The observed susceptibility anisotropics and molecular g-values are: (2χaa−χbb−χcc) = 37.85(69) • 10−6 erg G−2 mole−1, (2χbb−χcc−χaa) = 56.85(54) • 10−6 erg G−2 mole−1, gaa= −0.0393(3), gbb= −0.0277(3), and gcc = 0.0042(2). The Zeeman parameters have been used to derive the molecular electric quadrupole moments and vibronic ground state expectation values for the electronic second moments. The observed out-of-plane quadrupole moment is discussed with reference to an additivity scheme proposed earlier. The observed out-of-plane component of the molecular magnetic susceptibility tensor is in excellent agreement with the value predicted earlier from the CNDO/2-π-electron density alternation at the ring atoms.
Submillimeter Wave Spectrum of HS34SH
Authors: Mittler P. , Winnewisser G. , Yamada K. M. T. 
Published: February 2015

Abstract
The rotational spectrum of 34S-substituted disulfane, HS34SH, has been measured between 60 and 420 GHz, yielding for the first time the rotational constants A = 146694.949 MHz, B = 6779.018 MHz and C = 6776.339 MHz, together with a complete set of J4 and J6 distortion constants.
Internal Cation Mobilities in Molten (Na,Ag)NO3 Remeasured by the Column Method
Authors: Ichioka Kazunori , Okada Isao , Klemm Alfred 
Published: February 2015

Abstract
Internal mobility ratios bNa/bAg in molten (Na, Ag)NO3 have been measured with the column-method. From these, the densities and conductivities the internal mobilities have been calculated. Contrary to results obtained with other methods, over the investigated range of concentration and temperature, bAg is greater than bNa. The various methods are discussed.
14N-and D-Hyperfine Structure in the Rotational Spectrum of Pyrrolidine
Authors: Ehrlichmann H. , Grabow J.-U. , Dreizler H. 
Published: February 2015

Abstract
We present an analysis of the rotational spectra of the normal and the N-deuterated pyrrolidine measured by microwave Fourier transform spectroscopy. The quartic centrifugal distortion con­ stants and the 14N coupling constants have been determined with higher accuracy. In addition the D hyperfine structure could be analyzed.
Molekülinterne Dipolorientierung und dielektrische Absorption in verdünnter Lösung bei Mikro-und Submillimeterwellen. V.Acetyl-Verbindungen
Authors: Klages Gerhard 
Published: February 2015

Abstract
The dielectric loss of sixteen molecules, eleven with the acetyle group in aromatic bonds and five in aliphatic bonds, has been measured in very dilute solutions of cyclohexene at 20 °C. Five of these molecules are investigated in decalene solutions, too. The measurements have been made at wavenumbers in the range 0.08 to 140 cm -1 above 8 cm -1 making use of a pumped molecular laser. They are supplemented by the data of a Fourier transform spectrometer up to 300 cm -1. All microwave spectra of loss factor ε″ are analysed in terms of three absorption areas using the two variable Mori formalism. On the other hand, Lorentz curves are fitted to the FIR absorption spectra of α(v̄).
The fast relaxation process of the aliphatic compounds is suggested to be due to intramolecular reorientation of the acetyle group itself, since in acetyle cyclohexene the remaining part of the molecule is rigid. To the contrary, the acetyle group is not able to reorientate swiftly, if bounded to aromatic rings. Presumably, it is fixed by mesomeric interaction with the dipole in the plain of the ring. However, 2-methyl acetophenone and 1-acetyle naphthone show some quick dipole reorientation, which coincides with a steric hindrance of the group in entering the plain of the ring.
Planetary Compositions - Clues from Meteorites and Asteroids
Authors: Scott Edward R. D. , Newsom Horton E. 
Published: February 2015

Abstract
We review the chemical and mineralogical properties of primitive meteorites and chemical data for the Sun, Comet Halley and interplanetary dust particles. Regardless of where meteorites formed, concentrations of rock-forming elements in solar nebular solids could not have varied simply with distance from the Sun. Thus compositional differences between neighboring planets and the chemical and mineralogical diversity of chondritic asteroids may have been caused by local variations in the compositions of planetesimals, rather than transport of planetesimals over large heliocentric dis­ tances. Chemical variations were partly caused by differential transport and preferential agglomer­ ation of various presolar and solar grains and aggregates, and the production from these aggregates of diverse types of chondrules, refractory inclusions and other chondritic components in brief, local high temperature events in the nebula. These processes were just as important in controlling solar system chemistry as effects due to changes in ambient nebular temperatures and pressures. Differ­ ences between the Fe/Si ratios of the Sun, CI chondrites, interplanetary dust particles and Comet Halley suggest that planetesimals in the outer solar system had diverse relative concentrations of rock-forming elements.
Study Butte: A Chaotic Chondrite Breccia with Normal H-Group Chemistry
Authors: Fredriksson K. , Jarosewich E. , Wlotzka F. 
Published: February 2015

Abstract
The Study Butte (SB) H-group chondrite is an accretionary, well-indurated, multicomponent breccia of exceptional complexity. It contains practically all previously described types of chondrules (in two discrete populations according to Fe/Mg and Al/Ca distributions) and fragments (including CAI’s and also some which were not observed before, e.g. an “andesite”); furthermore it is gas-rich. According to currently popular definitions, it can be ascribed to petrographic type 3 based on overall texture, presence of glass in chondrules and the wide spread of pyroxene and olivine composition (PMD 30), although about 2/3 have nearly constant Fa 17 (PMD 4) in the normal H-range. In addition, Al and Ca in individual chondrules with normal H-olivines, Fa 16-20, are negatively correlated, as usual in chondrules from H 4.5 chondrites [3], but are positively correlated in other chondrules. Thus SB has the properties of both “equilibrated” and “unequilibrated” chondrites. However, in spite of the multitude and complexity of components, the bulk composition is that of normal H-chondrites. A great variety of multi-stage accretion and chondrule formation, break-ups, heating and compaction processes in a quasi closed system are clearly indicated; no clues to preceding nebular processes have been recognized. After the descriptive and analytical data a “Model”, based upon bulk composition, for the formation of chondrules and chondrites is presented.
Gold-Alkalimetallsysteme, III. Hochdrucksynthese und Kristallstruktur von Rb3Au7 [1] / Gold-Alkali Metal-Systems, III. High Pressure Synthesis and Crystal Structure of Rb3Au7 [1]
Authors: Range Klaus-Jürgen , Grosch Georg H. , Rau Franz , Klement Ulrich 
Published: February 2015

Abstract
The intermetallic compound Rb3Au7 could be synthesized from the elements at 4 kbar, 700 °C in a modified Belt-type apparatus. The structure (Cmmm; a = 5.579(1), b = 13.267(5), c = 7.265(2) Å; Z = 2; R = 0.035, Rw = 0,031) comprises three crystallographically independent Au atoms, arranged in layers along the c-axis. The shortest interatomic distances are Au -Au = 2.633Å, Au -Rb = 3.438Å and Rb -Rb = 3.622Å.
Cs2SnTe4, ein Polytelluridostannat(IV) mit Kettenstruktur 1
∞[SnTe2-
4] / Cs2SnTe4, a Polytelluridostannate(IV ) with Chain Structure 1
∞[SnTe2-
4]
Authors: Sheldrick W. S. , Schaaf B. 
Published: February 2015

Abstract
The cesium polytelluridostannate(IV) Cs2SnTe4 has been prepared by methanolothermal reaction of Cs2CO3 with Sn and Te at 190 °C. The crystal structure contains chain anions 1
∞[SnTe2-
4] in which individual SnTe4 tetrahedra are linked via Te -Te bonds of length 2.814(3) Å. Weak Te∙∙∙Te secondary bonds of length 3.631(3)-3.663(3) Å connect neighbouring chains into a framework structure. Nine Te atoms from three chain anions participate in the coordination sphere of the cesium cation.
Synthese und Komplexierung des 4.5-Cycloocta-2,3-dihydro-1,2,3-trimethyl-1,3-diborols / Synthesis and Complexation of 4,5-Cycloocta-2,3-dihydro-1,2,3-trimethyl-1,3-diborole
Authors: Fenner Ulrich , Pritzkow Hans , Siebert Walter 
Published: February 2015

Abstract
Redox reactions of cyclooctyne and 1,1-bis(diiodboryl)ethane lead to 4,5-cycloocta-2,3-dihydro-1,3-diiodo-2-methyl-1,3-diborole (1a), which is methylated with AlMe3 to give 4,5-cycloocta-2,3-dihydro-1,2,3-trimethyl-1,3-diborole (1b). Complexation of 1b with the complex fragments (C5H5)Co, (C8H12)Ni, (C5H5)Ni, and (OC)3Co leads to the corresponding metal complexes 2b, 3b, 4b, and 5b. Their constitutions are derived from spectroscopic data and confirmed for 2b and 4b by X-ray structure analyses. 2b contains a C-H-B 3c/2e bond, its hydrogen atom could be located. [(C8H12)Ni(1b)] (3b) is the first example for a (C8H12)Ni complex having a C-H-B interaction.
Structures and Magnetic Properties of Dinuclear Iron(III) Complexes
Authors: Elmali Ayhan , Elerman Yalcin , Svoboda Ingrid , Fuess Hartmut , Griesar Klaus , Haase Wolfgang 
Published: February 2015

Abstract
The compounds [FeL1(MeOH)Cl]2 (1), [FeL2Cl]2 (2) and [FeL3Cl]2 (3), with L1 for N-2-hydroxy-4-chlorophenylsalicylaldimin, L2 for N-2-hydroxyphenyl-3-hydroxy-2-naphthaldimin, and L3 for N-2-hydroxy-4-chlorophenyl-3-hydroxy-2-naphthaldimin, have been synthesized. 1 crystallizes in the monoclinic system, space group P21/c. The lattice parameters are a = 7.347(1), b = 21.390(1), c = 9.555(2) Å, β = 104.92(1)° with Z = 2. The crystal structures of 2 and 3 were reported previously. In all structures, two identical [FeL] fragments, related by an inversion center, are connected by two bridging oxygen atoms to form a binuclear unit in the supported condition. Magnetic susceptibility measurements in the range 4.2 < T < 286.5 K re­vealed the diiron (III) centers of 1, 2, and 3 to be weakly antiferromagnetically coupled with spin exchange coupling constants J1 = -7.7(1) cm-1, J2 = -6.5(1) cm-1, and J3 = -10.9(1) cm-1, respectively.
Synthesen, 121Sb-Mößbauer-Spektren und Strukturen von [SbF3(18-Krone-6)], [SbF3(18-Krone-6)]·CH3CN und [(SbF3)2(12-Krone-4)] / Synthesis, 121Sb-Mößbauer Spectra and Structures of [SbF3(18-Crown-6)], [SbF3(18-Crown-6)]·CH3CN, and [(SbF3)2(12-Crown-4)]
Authors: Becker Irina , Windhaus Marcus , Mattes Rainer 
Published: February 2015

Abstract
The crown ether complexes SbF3(18-crown-6) (1), SbF3(18-crown-6) · CH3CN (2) and (SbF3)2(12-crown-4) (3), have been prepared by reactions of SbF3 and the corresponding crown ether. They have been characterized by IR. Raman and 121Sb-Mößbauer spectroscopy, and by X-ray structure determinations. The s electron density at the Sb atom is diminished in these complexes. 1 and 2 show a symmetrical half-sandwich structure, with coplanar O atoms and Sb-O distances ranging from 298 to 321 pm. 3 has a band-like structure. The two metal centers adopt different stereochemistries. The Sb-O distances are in the range from 269 to 325 pm. One oxygen atom of 12-crown-4 has a bridging function. Crystal data for 1: space group P212121, a = 823,1(1), b = 1146,1(2), c = 1807,0(3) pm, Z = 4; 2: space group P21/c, a = 1257,7(3), b = 828,9(2), c -1895,5(5) pm, β = 93,68(2). Z = 4; 3: space group P21/c, a = 805,6(1), b = 2143,1(4), c = 836,4(2) pm, β = 90,98(1), Z = 4.
Monomeres [(Me3Si)2CH]2Al-Te-Al[CH(SiMe3)2]2 mit gewinkelter Al-Te-Al-Gruppe / Monomeric [(Me3Si)2CH]2Al-Te-Al[CH(SiMe3)2] 2 with a Bent Al-Te-Al Group
Authors: Uhl Werner , Schütz Uwe 
Published: February 2015

Abstract
Tetrakis[bis(trimethylsilyl)methyl]dialane(4) 1 with an Al-Al bond and Et3P+-Te- give under mild conditions the title compound R2Al-Te-AlR2 (R = CH(SiMe3)2) 2 in high yields. Due to the high steric shielding 2 is monomeric even in the solid state with an angled Al-Te-Al group (110.4°) and an Al-Te bond length of 254.9 pm as expected for a Al-T e single bond with the atoms in low coordination numbers. A hindered rotation of the bulky substituents is observed in solution probably caused by steric restrictions similar that in ana­logous compounds with Al-S-Al or Al-CH2-Al groups.
5-Alkoxy(Aralkoxy)-3,6-dihydro-2H-1,3,4-oxadiazin-2-one(thione) aus 2-Hydroxycarbonsäure-hydrazonid-estern / 5-Alkoxy(Aralkoxy)-3,6-dihydro-2H-1,3,4-oxadiazin-2-ones(thiones) from 2-Hydroxycarbohydrazono Esters
Authors: Geffken Detlef , Holst Carsten 
Published: February 2015

Abstract
The sulfhydrolysis of the glycolimidates 3 affords 2-hydroxy thiocarboxylic O-esters (4), which on treatment with phenylhydrazine give glycolohydrazonates of type 5. Under suitable conditions the reaction of 5 with phosgene or 1,1′-thiocarbonyldiimidazole produces 3,6-dihydro-2H -1,3,4-oxadiazin-2-ones(thiones) 6 as stable compounds.
Elektronentransfer und Ionenpaar-Bildung, 34 [1 - 3] Einkristallstruktur des Solvens-separierten Radikalionenpaares [9,9′-Bianthryle·⊖][Na⊕(DME)3] / Electron Transfer and Ion Pair Formation, 34 [1-3] Single Crystal Structure of the Solvent-Separated Ion Pair [9,9′-Bianthryle·⊖][Na⊕(DME)3]
Authors: Bock Hans , John Andreas , Näther Christian , Havlas Zdenek 
Published: February 2015

Abstract
The one-electron transfer to large π-delocalized hydrocarbons provides an interesting possibility to crystallize solvent-separated ion-pair salts containing optimally solvated cations. Accordingly, the reduction of 9.9′-bianthryl in aprotic 1.2-dimethoxyethane (DME) solution at a sodium metal mirror allows to grow dark blue, brick-like crystals of its radical anion and threefold DME-solvated sodium cation. The structure of the radical anion is very similar to that recently published for the neutral molecule. According to AM 1 enthalpy hypersurface calculations based on the structural data, the torsion angle between 60° and 120° is determined by the lattice packing and the negative charge is -π-delocalized predominantly within only one anthracene subunit. The counter cation [Na⊕(DME)3], reported only three times so far, shows a sixfold propeller-like coordination of approximate D3 skeletal symmetry with contact distances Na⊕···O between 232 and 243 pm and angles ≮ONa⊕O varying between 69° and 159°. Due to the small repulsion between the chelating DME molecules, the isodesmically calculated Na⊕ solvation enthalpy is more negative than that of the analogous tetrahydrofuran complex [Na⊕(THF)6] - as confirmed by the laboratory experience that salts of less stable anions are preferentially crystallized from a strongly cation solvating DME solution.
Die Kristallstruktur des Lithium-Benzamidinats {Li3[C6H5 - C(NSiMe3)2]3 · NC - C6H5} / The Crystal Structure of the Lithium Phenylamidinate {Li3[C6H5 - C(NSiMe3)2]3 · NC - C6H5}
Authors: Goesmann Helmut , Fenske Dieter 
Published: February 2015

Abstract
Single crystals of the title compound have been prepared by the reaction of benzonitrile with LiN-(SiMe3)2 in hexane and subsequent evaporation of the solvent. Space group P21/n, Z = 4, structure solution with 7945 observed unique reflections. R = 0.052. Lattice dimensions at -70 °C: a = 1485.2(9); b = 2486.9(11); c = 1568.9(8) pm; β = 91.06(4)°. The compound forms a trimeric ion ensemble in which two of the lithium cations are coordinated by three nitrogen atoms of two phenylamidinate an ions, the other one by four nitrogen atoms of two chelating phenylaminidate anions and in addition by the nitrogen atom of a benzonitrile molecule.
1,3-Di-terf-butyl-6H-benzo[b]naphtho[1,2-d]pyran-6-thione, a Severely Helically Distorted Thionolactone-Bridged Biaryl
Authors: Bringmann Gerhard , Wuzik Andreas , Schupp Olaf , Peters Karl , Peters Eva-Maria 
Published: February 2015

Abstract
The title compound 2c, a potentially useful synthetic intermediate in stereoselective biaryl synthesis, has been prepared from the oxolactone 1c, by treatment with Lawesson′s reagent. An X-ray structure analysis reveals its strongly helically distorted structure, the overall molecular distortion even slightly exceeding that of the corresponding oxo compound 1c.
Über die Reaktionen von (CH3)4N+I-, (CH3)4
N+ICl2
-, (CH3)4N+ICl4
- und (CH3)4N+Cl- mit Trifluormethylhypochlorit CF3OCl / The Reactions of (CH3)4N+I-, ( CH3)4N+ICl2
-, (CH3)4N+ICl4
- and (CH3)4N+Cl- with Trifluoromethylhypochlorite CF3OCl
Authors: Minkwitz Rolf , Bröchler Raimund 
Published: February 2015

Abstract
The fluorinating properties of CF3OCl have been demonstrated by the reactions with different iodate salts like (CH3)4N+I-, (CH3)4N+ICl2
- and (CH3)4N +ICl4
- . At -70°C all reactions give hexafluoroiodate(V ) salts IF6
- . In contrast, the reaction of CF3OCl with (CH3)4N+Cl+ yields (CH3)4N+OCF3
-. The products have been characterized by vibrational and NMR spectra.
Synthese und Röntgen-Strukturuntersuchung von Rb4Cd(VO)(V2O7)2Cl und Tl4Cd(VO)(V2O7)2Cl / Synthesis and X-Ray Structure Analysis of Rb4Cd(VO)(V2O7)2Cl und Tl4Cd(VO)(V2O7)2Cl
Authors: Mertens B. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of (I) Rb4Cd(VO)(V2O7)2Cl und Tl4Cd(VO)(V2O7)2Cl have been prepared by flux techniques. The compounds were examined by X-ray analysis. They crystallize with tetragonal symmetry, space group C1
4-P4 with (I): a=9.142(1); c=5.525(1), (II): a=9.150(1), c=5.405(1) A, Z = 4. Both compound belong to the K4CuV5O15Cl-Type. V (l) forms V2O7 double tetrahedra, connected by square V(2)O5 pyramids and CdO4Cl2 octahedra. The short V(2)-O distance indicates a vanadyl group.
Synthese und Kristallstruktur von [Se3N2Cl]+SbCl6
- / Synthesis and Crystal Structure of [Se3N2Cl]+SbCl6
-
Authors: Lau Carsten , Neumüller Bernhard , Dehnicke Kurt 
Published: February 2015

Abstract
Chloro-Cycloselenazenium Hexachloroanti-monate(V), Synthesis, Crystal Structure [Se3N2Cl]+SbCl6
- has been prepared as red crystals by the reaction of the nitride chloride Se2NCl5 with antimony(III) chloride in dichloromethane. It was characterized by a crystal structure determination. Space group PI, Z = 2, 4396 observed unique reflections, R = 0.030. Lattice dimensions at -80 °C: a = 698.2, b = 699.7, c = 1510.5 pm, α = 89.45°, β = 86.18°, γ = 68.22°. The structure consists of two symmetry-independent cations and two symmetry independent anions, which differ only slightly from each other. The cations contain Se3N2 five-membered rings, which deviate very little from planarity as shown by fol­ ding angles of 14° and 18°. The Se-N bond distances are between 171.4 and 176.4 pm suggesting double-bond constituents.