Separation of the energetic and geometric contribution to the aromaticity. Part IX. Aromaticity of pyrazoles in dependence on the kind of substitution

Phase annealing in SHELX-90: direct methods for larger structures

George M. Sheldrick · Acta Crystallographica Section A Foundations of Crystallography · 1990 · 16.3K citations

Numerical Analysis, X-ray Crystallography, Crystal Structure +16

<i>International Tables for X-ray Crystallography</i>

Acta Crystallographica Section B · 1976 · 14.2K citations · Full text

X-ray Crystallography, Crystal Structure, International Tables +5

Nucleus-Independent Chemical Shifts:  A Simple and Efficient Aromaticity Probe

Paul von Ragué Schleyer, Christoph Maerker, Alk Dransfeld et al. · Journal of the American Chemical Society · 1996 · 6.1K citations

Organic Charge-transfer Compound, Chemical Engineering, Engineering +13

Definition of aromaticity basing on the harmonic oscillator model

Jerzy Kruszewski, Tadeusz M. Krygowski · Tetrahedron Letters · 1972 · 1.3K citations

Harmonic Oscillator Model, Polycyclic Aromatic Hydrocarbon, Spectra-structure Correlation +1

The development of versions 3 and 4 of the Cambridge Structural Database System

Frank H. Allen, John E. Davies, J. Galloy et al. · Journal of Chemical Information and Computer Sciences · 1991 · 1.3K citations

Engineering, Chemical Analysis, Structured Data +29