Untersuchungen an Stickstoff-Brom-Verbindungen, IV / Studies on Nitrogen-Bromine Compounds, IV

1977 ◽  
Vol 32 (12) ◽  
pp. 1416-1420 ◽  
Author(s):  
Omar Jabay ◽  
Hans Pritzkow ◽  
Jochen Jander
Keyword(s):  
Crystal Structure ◽  
Nitrogen Atom ◽  
Structure Analysis ◽  
Electron Acceptors ◽  
Molecular Structures ◽  
Hydrogen Atoms ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Solid Nitrogen ◽  
Intermolecular Contacts

The crystal and molecular structures of N-bromobenzamide (NBB), N-bromosuccinimide (NBS), and N,N-dibromobenzenesulfonamide (NBBS) were determined by X-ray structure analysis. The nitrogen atoms in NBB and NBS have a trigonal planar coordination (sp2) and the N—Br distances lie in the same range (1.82 A, 1.84 A). The N—Br distance in NBBS, where the nitrogen atom is sp3-hybridized, is somewhat longer (1.88 A). In these structures the molecules are connected by O···H—N (NBB), O···Br—N (NBS) or N···Br—N (NBBS) intermolecular bonds forming endless chains; positivated hydrogen atoms or, in case that they are absent, positivated bromine atoms act as electron acceptors with oxygen or sp3- hybridized nitrogen atoms. These results suggest, that in solid nitrogen tribromide, the crystal structure of which cannot be determined, the nitrogen atoms will be sp3-hybridized and intermolecular contacts via N—Br···N will occur.

Crystal and Molecular Structures of the Sulfurization and Selenation Products of Bis[bis(trimethylsilyl)amino]germanium(II). Crystal Structure of (Triphenylphosphine)gold(I) Bis(trimethylsilyl)amide

2000 ◽  
Vol 55 (5) ◽  
pp. 347-351 ◽  
Author(s):  
Gerald L. Wegner ◽  
Alexander Jockisch ◽  
Annette Schier ◽  
Hubert Schmidbaur
Keyword(s):  
Crystal Structure ◽  
Nitrogen Atom ◽  
Elemental Sulfur ◽  
Crystal Structure Analysis ◽  
Molecular Structures ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Planar Configuration ◽  
High Yields ◽  
Single Crystal Structure Analysis

Treatment of bis[bis(trimethylsilyl)amino]germanium(II) with elemental sulfur or selenium affords high yields of the corresponding monosulfide [(Me3Si)2N]2GeS and selenide [(Me3Si)2N]2GeSe, respectively. The crystalline products have now been shown to be cyclic dimers with (GeS/Se)2 four-membered rings by X-ray single crystal structure analysis. The crystal structure of (triphenylphosphine)gold(I) bis(trimethylsilyl)amide (Ph3P)Au-N(SiMe3)2 has also been determined. The molecule is a monomer with a tricoordinate nitrogen atom in a planar configuration [Si2NAu]. The compound does not undergo insertion of the bis[bis(trimethylsilyl)amino]germylene.

Arsenic(III), Antimony (III) and Bismuth(III) Thiobenzoates: Crystal and Molecular Structures of M(SOCR)3 and PhSb(SOCPh)2

1998 ◽  
Vol 53 (12) ◽  
pp. 1475-1482 ◽  
Author(s):  
Prit Singh ◽  
Sudha Singh ◽  
Vishnu D. Gupta ◽  
Heinrich Nöth
Keyword(s):  
Crystal Structure ◽  
Molecular Structures ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Covalently Bonded ◽  
Bismuth Complex ◽  
Group 15 ◽  
Structure Determinations ◽  
Trigonal Pyramid ◽  
Trigonal Prisms

Abstract Tris-thiobenzoates, Arsenic, Antimony, Bismuth Tris-thiobenzoates of arsenic, antimony and bismuth, M(SOCR)3 have been obtained from their oxides and characterized. In the X-ray crystal structure determinations of these, the group 15 atom and the three covalently bonded sulfur atoms are found to constitute a trigonal pyramid, the central atoms lie at a C3 axis. In the bismuth complex the thiobenzoate ligand tends to chelate. However, three comparatively short intermolecular M···S interactions are significant features for these molecules resulting in stacking of trigonal prisms providing an essentially six coordinate environment around arsenic and antimony and a nine-coordinate one for bismuth. The structure of PhSb(SOCPh)2 can be considered

Two crystal structures of 10,10′-(l,4-phenylene-dimethylidene)-bis-9,10-H-anthracenone

1992 ◽  
Vol 200 (3-4) ◽  
Author(s):  
G. Dewald ◽  
M. Hanack ◽  
E.-M. Peters ◽  
L. Walz
Keyword(s):  
Crystal Structures ◽  
Diffraction Data ◽  
Molecular Structures ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Hydrogen Atoms ◽  
Space Group ◽  
X Ray ◽  
Crystal And Molecular Structures

AbstractThe crystal and molecular structures of dimorphic 10,10′-(1,4-phenylene-dimethylidene)-bis-9,10-H-anthracenone (1) have been determined using X-ray diffraction data. The compound crystallizes either in the monoclinic space groupSince all non-hydrogen atoms are of pure

Crystal and molecular structures of two aryldiazenato complexes of molybdenum of the type [Mo(N2Ar)(S2CNMe2)3]

1980 ◽  
Vol 33 (4) ◽  
pp. 717 ◽  
Author(s):  
GA Williams ◽  
ARP Smith
Keyword(s):  
Nitrogen Atom ◽  
Single Crystal ◽  
Crystal Lattice ◽  
Magnetic Moments ◽  
Nitro Derivative ◽  
Molecular Structures ◽  
Electron Donors ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal And Molecular Structures

The crystal and molecular structures of the aryldiazenato complexes of molybdenum, [Mo(N2C6H5)(S2CNMe2)3],CH2Cl2 (1), and the m-nitro derivative [Mo{N2C6H4(m-NO2)}-(S2CNMe2)3]2,�CH2Cl2,�H2O (2), have been determined by single-crystal X-ray diffraction methods at 294 K. Crystals of (1) are monoclinic, P21/n, a 13.056(1), b 13.366(1), c 15.350(1) Ǻ, β 93.80(1)°, Z 4. Crystals of (2) are monoclinic, C2/c, a 32.442(8), b 17.670(4), c 17.867(3) Ǻ, β 99.03(1)°, Z 8. Automatic diffractometry has provided significant Bragg intensities for 2849 (1) and 3898 (2) independent reflections and the structures have been refined by least-squares methods to R 0.036 (1) and 0.053 (2). The two unique molybdenum complexes in (2) are essentially chemically equivalent. The complexes in (1) and (2) possess the expected seven-coordinate pentagonal bipyramidal structures with the aryldiazenato ligands, singly bent, occupying axial positions. The N=N-Mo units are linear, and the bonding can be represented by N=N→Mo with the aryldiazenato ligands three-electron donors. The m-nitro substituent in (2) interacts with a dithiocarbamate (dtc) nitrogen atom, thereby affecting the redox behaviour of this compound. The possible significance of this O(nitro)...N(dtc) interaction to the mechanism, whereby included nitrobenzene solvent in the crystal lattice lowers the magnetic moments of ferric dithiocarbamates, is discussed.

Röntgenstrukturuntersuchungen an Trimethylsilylaluminiumverbindungen / X-Ray Crystal Study of Trimethylsilylaluminium Compounds

1983 ◽  
Vol 38 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Lutz Rösch ◽  
Gerald Altnau ◽  
Carl Krüger ◽  
Y.-H. Tsay
Keyword(s):  
Structure Analysis ◽  
Ion Pair ◽  
Molecular Structures ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Contact Ion Pair ◽  
Linear Chains ◽  
Pair Interactions

Abstract Structure, Tris(trimethylsilyl)aluminium, Sodium-tetrakis(trimethylsilyl)aluminate The crystal and molecular structures of three trimethylsilylaluminium compounds -tris(trimethylsilyl)aluminium coordinated to a diethylether molecule (1), sodium-tetrakis-(trimethylsilyl)aluminate coordinated to two toluene molecules (2b) and unsolvated sodium-tetrakis(trimethylsilyl)aluminate (2a) -have been determined by X-ray structure analysis. In all three compounds the aluminium is tetrahedrally coordinated, the Al-Si-distances lying between 2.44 and 2.49 Å. (1) is monomeric and (2a) and (2b) form linear chains resulting from contact-ion pair interactions.

Synthese und Kristallstruktur von Iodmethyltriphenylphosphonium-iodid (C6H5)3PCH2I+I- / Synthesis and Crystal Structure of Iodomethyltriphenylphosphonium Iodide (C6H5)3PCH2I+I-

1993 ◽  
Vol 48 (12) ◽  
pp. 1760-1766 ◽  
Author(s):  
H. Vogt ◽  
K. Lauritsen ◽  
L. Riesel ◽  
M. von Löwis ◽  
G. Reck
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Colourless Needle ◽  
Molecular Structures ◽  
Orthorhombic Space Group ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Mndo Calculations ◽  
Good Agreement

Iodomethyltriphenylphosphonium iodide, (C6H5)3PCH2I+I-, has been prepared by the reaction of (C6H5)3P with CH2I2 in dichloromethane forming colourless needle like crystals. The crystal and molecular structures have been determined by an X-ray structure analysis. The crystals are orthorhombic, space group Pca21, Z = 8; a = 1478,8(3) pm, b = 1249,3(3) pm, c = 2053,2(3) pm. R = 0.050 for 3219 observed reflections with I ≥ 2 σ(Ι). In the solid state the title compound exists as two discrete monomeric units, (C6H5)3PCH2I+I-. In both symmetry independent units the I-I distances are surprisingly short with 346,5(1) pm and 356,3(1) pm. For the title compound the results of AM 1, PM 3, and MNDO calculations are in good agreement with corresponding values determined by the X-ray analysis.

Convenient synthesis, X-ray crystal structure, and Raman spectrum of the heptasulphide dianion, S72−, in [PPN]2S7•2EtOH

1986 ◽  
Vol 64 (8) ◽  
pp. 1509-1513 ◽  
Author(s):  
Tristram Chivers ◽  
Frank Edelmann ◽  
John F. Richardson ◽  
Kenneth J. Schmidt
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Molecular Structures ◽  
High Yield ◽  
Torsion Angles ◽  
X Ray ◽  
X Ray Crystallography ◽  
Crystal And Molecular Structures ◽  
Convenient Synthesis ◽  
Stretching Vibrations

The S72− ion is readily prepared in high yield by the reaction of [PPN]SH with cyclo-S8 in ethanol. The crystal and molecular structures of [PPN]2S7•2EtOH have been determined by X-ray crystallography. The crystals are monoclinic and belong to the space group P21, a = 13.199(2), b = 19.414(2), c = 14.046(2) Å, β = 94.027(6)°, V = 3590.3(7) Å3, Z = 2. The final R and Rw values were 0.064 and 0.060, respectively. The S72− ion is an unbranched chain of sulphur atoms in the cis,trans,cis-configuration with torsion angles of 89.99(18), 71.84(16), 76.54(16), and 94.19(18)°. The S—S distances (in Å) become progressively smaller in the sequence d(S—S central) [2.072(3) and 2.070(3)] > d(S—S internal) [2.050(2) and 2.037(3)] > d(S—S) terminal [2.044(3) and 2.026(4)]. The Raman spectrum of the S72− ion in [PPN]2S7•2EtOH exhibits characteristic S—S stretching vibrations at 503, 453, 419, and 395 cm−1.

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