## Molecular structure: its study by crystal diffraction |

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### Contents

Catechismai Prologue | 1 |

The Willing Molecule and the Reluctant Chemist | 2 |

Some Considerations of Symmetry | 5 |

Copyright | |

11 other sections not shown

### Common terms and phrases

1000 reflexions absolute configuration accuracy accurate amplitudes anion atomic number average axes Bijvoet bondlengths Bragg reflexions C-C distance calculated cent centre of symmetry centrosymmetric chemical chemistry chemists compounds coplanar correspond crotonic acid crystal structure crystal-structure analysis crystallise crystallographic determine diagram diffraction pattern dihedral angles direct methods electron A-3 electron density electron-density distribution equation example experimental explain Fourier maps Fourier series Fourier synthesis Friedel's Law function H atoms H—CI heavy atom heavy-atom method hydrogen atoms hydrogen bond infinite intensity lattice layers least-squares refinement measured Millerian indices molecular structure motions naphthalene negative nucleus number of electrons observed optical ortep oxygen pair parameters peaks Phase Problem phthalocyanine planar positions possible precision primitive translation PRINCIPLES projection protein relative represented Reproduced Robertson and Woodward signs solved space group spherical standard deviations structure analysis structure factors summation symmetry elements theory unit cell vibrational wavelength x-ray analysis x-ray diffraction