Andreas H. Maulitz

Derivate des Imidazols, VI. Stabile Carben‐Borane

Norbert Kühn, Gerald Henkel, Thomas Kratz et al. · Chemische Berichte · 1993 · 149 citations

Imidazole Derivatives, Inorganic Compound, Derivative (Chemistry) +10

The molecular and solid‐state structure of borazine has been determined at 115 and 160 K by single‐crystal X‐ray crystallography. The molecular structure has <i>C</i>₂ symmetry with small deviations from the expected <i>D</i>_3<i>h</i> symmetry. The mean value of the BN bond length is 1.429(1) A and the interbond angles of the six‐membered ring are 117.1(1)° at the boron atoms and 122.9(1)° at the nitrogen atoms (mean values). Similar to benzene an unambiguous assignment of the molecular symmetry is not possible. — The crystal packing is not comparable to any known phase of benzene, and surprisingly the molecules are not stacked having coplanar rings. Instead, the molecules are found in tilted layers. No significant intermolecular interaction could be detected. The generated difference electron density maps show the typical distribution pattern for polar bonds.

Roland Boese, Andreas H. Maulitz, Peter Stellberg · Chemische Berichte · 1994 · 102 citations

The Effect of Fusion of Angular Strained Rings on Benzene: Crystal Structures of 1,2‐Dihydrocyclobuta[<i>a</i>]cyclopropa[<i>c</i>]‐, 1,2,3,4‐Tetrahydrodicyclobuta[<i>a,c</i>]‐, 1,2,3,4‐Tetrahydrodicyclobuta[<i>a,c</i>]cyclopropa[<i>e</i>]‐, and 1,2,3,4,5,6‐Hexahydrotricyclobuta[<i>a,c,e</i>]benzene

Roland Boese, Dieter Bläser, W. E. Billups et al. · Angewandte Chemie International Edition in English · 1994 · 84 citations

Crystal Structure, Engineering, Organic Chemistry +17

Single-Crystal Structure and Electron Density Distribution of Ammonia at 160 K on the Basis of X-ray Diffraction Data

Roland Boese, Norbert Niederprüm, Dieter Bläser et al. · The Journal of Physical Chemistry B · 1997 · 77 citations

X-ray Crystallography, Crystal Structure, Engineering +16

Calculation of the Potential Energy Surface for Intermolecular Amide Hydrogen Bonds Using Semiempirical and <i>Ab Initio</i> Methods

Helgi Adalsteinsson, Andreas H. Maulitz, Thomas C. Bruice · Journal of the American Chemical Society · 1996 · 61 citations

Hydrogen Bond Length, Engineering, Potential Energy Surface +14