ChemInform Abstract: Weakening of Amide Conjugation with a Nitrogen Atom Included in a Four Membered Ring.

Crystals of 7-azaindole ([Formula: see text], a = 11.312(4), b = 14.960(6), c = 15.509(5) Å, α = 102.86(3), β = 108.78(3), γ = 90.71(3)°, Z = 16, R = 0.052) contain tetrameric units of approximate S4 symmetry, in which the molecules are associated by means of four complementary N—H … N hydrogen bonds. [CH3Hg(7-azaindole)]NO3 ([Formula: see text], a = 7.818(3), b = 7.884(3), c = 9.135(4) Å, α = 97.89(3), β = 109.13(3), γ = 103.28(3)°, Z = 2, R = 0.039) contains well-separated nitrate ions and complex cations in which the methylmercury group is linearly bonded to the pyridine nitrogen atom, whereas the five-membered ring remains protonated. In the neutral [CH3Hg(azaindolate)] complex ([Formula: see text], a = 10.926(10), b = 11.333(8), c = 11.647(10) Å, α = 92.13(8), β = 104.83(9), γ = 111.86(7)°, Z = 6, R = 0.048), methylmercury groups have substituted the N—H proton in the five-membered ring for the three symmetry-independent molecules. Intermolecular secondary Hg … N bonds are found with pyridine nitrogens. Keywords: azaindole, methylmercury, crystal structure.

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ChemInform Abstract: Five-Membered Ring Systems: With More Than One Nitrogen Atom

ChemInform ◽

10.1002/chin.199121304 ◽

2010 ◽

Vol 22 (21) ◽

pp. no-no

Author(s):

S. A. JUN. LANG ◽

C. B. JUN. ZIEGLER

Keyword(s):

Nitrogen Atom ◽

Membered Ring ◽

Ring Systems

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

Zeitschrift für Naturforschung B ◽

10.1515/znb-1996-0709 ◽

1996 ◽

Vol 51 (7) ◽

pp. 959-962 ◽

Cited By ~ 5

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.

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The Synthesis of Some 9-,10-, and 11-Membered Ring Compounds Containing a Nitrogen Atom: 2,3,4,5,6,7-Hexahydro-1H-3-Benzazonines, 1,2,3,4,5,6,7,8-Octahydro-3-Benzazocines, and 2,3,4,5,6,7,8,9-Octahydro-1H-3-Benzazacy-cloundecanes

Synthetic Communications ◽

10.1080/00397917308062025 ◽

1973 ◽

Vol 3 (2) ◽

pp. 153-160 ◽

Cited By ~ 1

Author(s):

B. Pecherer ◽

F. Humiec ◽

A. Brossi

Keyword(s):

Nitrogen Atom ◽

Membered Ring ◽

Ring Compounds

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The Structures of the Free-Radical Scavenger 1,1,3,3-Tetramethylisoindolin-2-Yloxyl, and of the Alkoxy Amine Derivative 5-(1,1,3,3-Tetramethylisoindolin-2-Yloxy)-1-Vinylpyrrolidin-2-One

Australian Journal of Chemistry ◽

10.1071/ch9860357 ◽

1986 ◽

Vol 39 (2) ◽

pp. 357 ◽

Cited By ~ 14

Author(s):

WK Busfield ◽

LM Engelhardt ◽

PC Healy ◽

ID Jenkins ◽

SH Thang ◽

...

Keyword(s):

Free Radical ◽

Solid State ◽

Nitrogen Atom ◽

Free Radical Scavenger ◽

Membered Ring ◽

Radical Scavenger ◽

Monoclinic Space Group ◽

Space Group ◽

X Ray ◽

Amine Derivative

The structures of the title nitroxide , C12H16NO (1), and the alkoxy amine derivative, C18H24N2O2 (2), have been determined by single-crystal X-ray structural analyses. Crystals of (1) are monoclinic, space group Cc with a 11.585(6), b 11.697(10), c 16.753(8)Ǻ, β 94.33(6)°, Z 8; R was 0.064 for 1226 independent reflections. The -C(NO)C- group is essentially planar (sum trigonal angles 359.9, 359.9°, as is the five- membered ring. The N-O distances are 1.249(6), 1.252(8)Ǻ. Crystals of (2) are monoclinic, space group P21/c, a 8.295(2), b 13.567(5), c 15.294(3)Ǻ, β 98.82(2)°, Z 4; R was 0.051 for 1445 independent reflections. By contrast to (1) the geometry about the nitrogen atom is pyramidal (sum trigonal angles 328°), and the corresponding five-membered ring has an envelope conformation with a nitrogen displacement of 0.45Ǻ. The N-O distance is 1.439(4)Ǻ. The high-resolution solid state 13C n.m.r . spectrum of (2) is discussed in relation to the X-ray structure.

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