, der erste einzähnig koordinierte Aziridin-Komplex / , the First Mono-Coordinate Aziridine Complex

1996 ◽  
Vol 51 (7) ◽  
pp. 959-962 ◽  
Author(s):  
Stephan von Beckerath ◽  
Ingo-Peter Lorenz ◽  
Riad Fawzi ◽  
Manfred Steimann
Keyword(s):  
Nitrogen Atom ◽  
Structure Analysis ◽  
Substitution Reaction ◽  
Membered Ring ◽  
X Ray ◽  
Co Substitution ◽  
Pyramidal Configuration

The photolytically induced CO-substitution reaction of CpMn(CO)3 with N-benzyl-aziridine leads to the first mono coordinate aziridine complex, . It is stable against thermal C2H4 elimination up to 135°C. No nitrene complexes {Cp(CO)2Mn}nNBz (n = 1, 2) were detected.The X-ray structure analysis of shows the intact three-membered ring ligand and the pyramidal configuration of the nitrogen atom.

Ubergangsmetall-substituierte Phosphane, Arsane und Stibane, LIX [1], Ein Addukt des Me3P-substituierten Ferrio-diphenylphosphans Cp(OC)(Me3P)Fe-PPh2 mit Methylisothiocyanat: Darstellung, Protonierung und Methylierung / Transition Metal Substituted Phosphanes, Arsanes and Stibanes, LIX [1]. An Adduct of the Me3P-Substituted Ferrio-diphenylphosphane Cp(OC)(Me3P)Fe-PPh2 and Methylisothiocyanate: Synthesis, Protonation, and Methylation

1998 ◽  
Vol 53 (10) ◽  
pp. 1077-1083 ◽  
Author(s):  
Wolfgang Malisch ◽  
Andre Spörl ◽  
Katharina Thirase ◽  
Oliver Fey
Keyword(s):  
Nitrogen Atom ◽  
Transition Metal ◽  
Diffraction Analysis ◽  
Sulfur Atom ◽  
Substitution Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Co Substitution

AbstractTreatment of the ferrio-phosphane Cp(OC)2Fe-PPh2 (1) with Me3P (2) yields Cp(OC)(Me3P)Fe-PPh2 (3) via CO-substitution. Reaction of 3 with methylisothiocyanate (4) leads to the formation of the adduct Cp(OC)(Me3P)Fe-PPh2 -C(S)NMe (5), which is regioselectively methylated at the sulfur atom with Mel (6a) or MeSO3CF3 (6b), respectively, to give the cationic complexes [Cp(OC)(Me3P)Fe-PPh2 -C(SMe)=NMe]I/CF3 SO3(7a,b). In contrast, protonation with CF3SO3H (8 ) occurs at the nitrogen atom, yielding [Cp(OC)(Me3P)Fe-PPh2- C(S)-N(H)Me]CF3SO3 (9). The structures of 7b and 9 have been determined by X-ray diffraction analysis

Regiospezifische Insertion von [SCN]- und [SeCN]- in die S – C- bzw. Se– C-Bindung Übergangsmetall-koordinierter Thietane und SelenetaneRegiospecific Insertion of [SCN]- and [SeCN]- in the S–C- and Se–C-Bond of Transition-Metal-Coordinated Thietanes and Selenetanes

1993 ◽  
Vol 48 (11) ◽  
pp. 1613-1620 ◽  
Author(s):  
Helmut Fischer ◽  
Claudia Kalbas ◽  
Carsten Troll ◽  
Klaus H. Fluck
Keyword(s):  
Nitrogen Atom ◽  
Transition Metal ◽  
Structure Analysis ◽  
Trans Isomer ◽  
X Ray ◽  
Tungsten Complexes ◽  
Membered Heterocycle

Pentacarbonyl(thietane)tungsten complexes react with thiocyanate, [SCN]-, and SiO2/H2O by insertion of the CN group into a S—C bond of the four-membered heterocycle, 1,3-migration of the pentacarbonyltungsten fragment and protonation of the nitrogen atom to give tungsten-coordinated thiazinthione complexes. Analogously, the reactions of a thietane tungsten complex with [SeCN]- and SiO2/H2O affords a thiazinselone complex. A selenazinthione complex is obtained from a selenetane complex and [SCN]- (+ SiO2/H2O). The insertions are regiospecific and stereoselective. The structure of the trans-isomer of a pentacarbonyl-(thiazinthione) complex has been established by X-ray structure analysis.

scholarly journals New Spiro-Tin Compounds: Reaction of N,N′-Dialkyl Sulfur Diimides with Cyclic Bis(amino)stannylenes - Unexpected Formation of a N-N Bond

1995 ◽  
Vol 50 (12) ◽  
pp. 1811-1817 ◽  
Author(s):  
Max Herberhold ◽  
Christian Köhler ◽  
Wolfgang Milius ◽  
Bernd Wrackmeyer
Keyword(s):  
Molecular Structure ◽  
Magnetic Resonance ◽  
Single Crystal ◽  
Structure Analysis ◽  
Membered Ring ◽  
Monoclinic Space Group ◽  
Unexpected Formation ◽  
Tin Compounds ◽  
X Ray ◽  
Tert Butyl

N,N′-Dialkyl sulfur diimides (1), R(NSN)R [R = Me (a), Et (b), nPr (c), nBu (d)] react with cyclic bis(amino)stannylenes such as 1,3-di-tert-butyl-4,4-dimethyl-1,3,4,2λ2-diazasilastannetedine (2) or 1,3-di-tert-butyl-4,4,5,5-tetramethyl-1,3,4,5,2λ2-diazadisilastannolidine (3) in a 2:1 ratio to give the new spiro-tin(IV) compounds 5a-d, 6b and 6c, built from the respective cyclic bis(amino)stannylene and a seven-membered ring in which the two sulfur diimide groups are coupled via a N-N bond and across the tin atom. A 1:1 adduct 4 is proposed as an intermediate which is the final product 4e in the case of R = tBu (1e). The products were characterized by multinuclear magnetic resonance (1H, 13C, 15N, 29Si, 119Sn NMR), and in the case of 5c the molecular structure was determined by single crystal X-ray structure analysis [monoclinic, space group C2/c ; a = 1504.1(3), b = 1393.3(3), c = 1688.6(3) pm; β = 115.71(3)°].

Zur Darstellung und Struktur des 1.3-Dichloro-5-N.N-dimethylamino-1.3-dithia-2.4.6-triazins / Synthesis and Structure of 1,3-Dichloro-5-N,N-dimethylamino-1,3-dithia-2,4,6-triazine

1983 ◽  
Vol 38 (3) ◽  
pp. 347-349 ◽  
Author(s):  
Herbert W. Roesky ◽  
Pierre Schäfer ◽  
Mathias Noltemeyer ◽  
George M. Sheldrick
Keyword(s):  
Structure Analysis ◽  
Nmr Spectra ◽  
Membered Ring ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Cl Atoms ◽  
C Nmr

Abstract The six membered ring of composition (CH3)2NCN3S2Cl2 3 a was prepared from N,N-dimethylguanidinhydrochloride and trithiadiazindichloride. 3 a was characterized on the basis of mass, 1H, 13C NMR spectra and X-ray structure analysis. Crystals of 3 a are monoclinic, space group P21/c, with a = 660.3(6), b = 834.5(7), c = 1774.7(15) pm, β = 112.83(6)° and Z = 4. The C2N unit lies approximately in the plane of the [-CNSNSN-] ring, with both Cl atoms on the same side of the ring.

Reaktion von N-Trimethylsilyl-N′(N″ -trimethylsilylammodiphenylphosphoranylidenimino) sulfamid mit Wolframoxitetrachlorid und die Struktur von (Cl3WNPPh2N)2 Reaction of N-Trimethylsilyl-N′(N″ -trimethylsilylaminodiphenylphosphoranylidene)sulfamide with Tungstenoxitetrachloride and the Structure of (Cl3WNPPh2N)2

1992 ◽  
Vol 47 (2) ◽  
pp. 171-174 ◽  
Author(s):  
H. W. Roesky ◽  
T. Raubold ◽  
M. Noltemeyer ◽  
M. Witt ◽  
R. Bohra
Keyword(s):  
Molecular Structure ◽  
Structure Analysis ◽  
Ring System ◽  
Membered Ring ◽  
X Ray

1The reaction of ClSO2N = PPh2Cl () with NH3 yields H2NSO2N = PPh2NH2 (2).This compound is converted to Me3Si(H)NSO2N = PPh2N(H)SiMe3 (3) by Me3SiNMe2. 3 reacts with WOCl4 under elimination of (Me3Si)2O and ClSO2NH2 to yield the eight-membered ring system (Cl3WNPPh2N)2 (4).The molecular structure of 4 was investigated by an X-ray structure analysis.

scholarly journals Synthese und Struktur von 3,3-Diorganyl-2,4-dioxa-l,5-dithia- 1,1,5,5-tetraoxid-3-silacyclohexanen und -heptanen / Syntheses and Structure of 3,3-Diorganyl-2,4-dioxa-1,5-dithia-1,1,5,5-tetraoxid- 3-silacyclohexanes and -heptanes

1994 ◽  
Vol 49 (3) ◽  
pp. 309-314 ◽  
Author(s):  
Peter Sartori ◽  
Ralf Jüschke ◽  
Roland Boese ◽  
Dieter Bläserb
Keyword(s):  
Structure Analysis ◽  
Membered Ring ◽  
Ring Systems ◽  
X Ray

AbstractReactions of di-silver-1,n-alkanedisulfonates 1a (n = 1) and 1b (n = 2) with Cl2SiR1R2 lead to the monomerie 3,3-diorganyl-2,4-dioxa-1,5-dithia-1,1,5,5-tetraoxid-3-silacyclohexanes (for n = 1) 2a (R1 = R2 = Me), 3a (R1 = Me and R2= Ph) and 4a (R1 = R2 = Ph) and -heptanes (for n = 2) 2b (R1 = R2 = Me), 3b (R1 = Me and R2 = Ph) and 4b (R1 = R2 = Ph). In the case of 2a-4a a competition reaction is observed leading to the dimerization products 5a (R1 = Me and R2 = Me), 6a (R1 = Me and R2 = Ph) and 7a (R1 = Ph and R2 = Ph). The six-membered ring-systems of 2a-4a are compared with related silanes. An X-ray structure analysis is per­formed for the 3,3-diphenyl-2,4-dioxa-1,5-dithia-1,1,5,5-tetraoxid-3-silacycloheptane (4b).

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.

Silaheterocyclen: Molekülstruktur eines 3-Oxa-2,4,6,7-tetrasilabicyclo[3.1.1]heptans / Silaheterocycles: Molecular Structure of a 3-Oxa-2,4,6,7-tetrasilabicyclo[3.1.1]heptane

1989 ◽  
Vol 44 (7) ◽  
pp. 796-799 ◽  
Author(s):  
Gabriele Reber ◽  
Jürgen Riede ◽  
Nils Wiberg ◽  
Gerhard Wagner ◽  
Gerhard Müller
Keyword(s):  
Molecular Structure ◽  
Dihedral Angle ◽  
Structure Analysis ◽  
Membered Ring ◽  
Triclinic Space Group ◽  
Space Group ◽  
X Ray

According to an X-ray structure analysis 1,5-bis(di-tert-butylmethylsilyl)-2,2,4,4,6,6,7,7-octamethyl-3-oxa-2,4,6,7-tetrasilabicyclo[3.1.1]heptane (1) is a rigid bicyclic molecule consisting of a 1,3-disilacyclobutane ring whose 2,4 positions are bridged by a Me2Si—O—SiMe2 fragment. The four-membered ring is non-planar with a dihedral angle of 33.8° along the C—C axis. The intraring valence angles at carbon are significantly smaller than those at silicon leading to a transannular Si ··· Si distance of only 2.558(1) Å (triclinic, space group P 1̄ with a = 9.125(2), b = 12.668(2), c = 15.499(3) Å, α = 101.25(1), β = 87.87(1), γ = 96.88(1)°, V = 1744.4 Å3 R (wR) = 0.044 (0.051) for 316 refined parameters and 5156 observables).

scholarly journals Synthese und Struktur von C5Me5Pd(PR3)X: Palladiumkomplexe mit einem unsymmetrisch gebundenen Pentamethylcyclopentadienylring [1] / Synthesis and Structure of C5Me5Pd(PR3)X: Palladium Complexes with an Unsymmetrically Bonded Pentamethylcyclopentadienyl Ring [1]

1983 ◽  
Vol 38 (6) ◽  
pp. 733-737 ◽  
Author(s):  
H.-J. Kraus ◽  
H. Werner ◽  
C. Krüger
Keyword(s):  
Structure Analysis ◽  
Palladium Complexes ◽  
Membered Ring ◽  
X Ray ◽  
Halide Ligand

Abstract The complexes C5Me5Pd(PR3)X (1-4) are prepared from [Cl(PR3)Pd]2(μ-OCOCH3)2 and TIC5Me5. Attempts to replace the halide ligand by a second C5Me5 or a C5H5 unit remained unsuccessful. The X-ray structure analysis of C5Me5Pd[P(i-Pr)3]Cl (3) indicates that the five-membered ring shows a tendency of η1-bonding towards the metal.

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