Some errors from the crystallographic literature, some amplifications and a questionable result.

Area of Science:

• Crystallography
• Materials Science
• Coordination Chemistry

Background:

• Accurate space group determination is crucial for understanding crystal structures and their properties.
• Previous crystallographic studies have reported conflicting or incorrect space group assignments for several compounds.
• Reliable crystallochemical comparisons require precise structural data.

Purpose of the Study:

• To correct and refine the space group assignments for a series of metal-organic frameworks and coordination compounds.
• To resolve discrepancies in reported crystallographic data.
• To facilitate more accurate crystallochemical analyses and comparisons.

Main Methods:

• Re-evaluation of crystallographic data, including X-ray diffraction analysis.
• Correction of space group assignments for various inorganic and organic-inorganic hybrid structures.
• Analysis of hydrogen bonding and atomic positions to resolve structural conflicts.

Main Results:

• Corrected space groups for [[Mo(2)(O(2)CCH(3))(4)('linker')](n)] with pyrazine and dabco to C2/m, and with 4,4'-bipyridine to C2/c.
• Revised space group for [[tris-(2-pyridylmethyl)amine]BrV(mu-O)VBr[tris-(2-pyridylmethyl)amine]]Br.H(2)O to C2/c.
• Resolved conflicting reports for Cu(H(2)O)-(phenanthroline)(2)(X)(2) structures.
• Identified and corrected errors in atomic assignments and structural details for several other compounds.

Conclusions:

• The corrected space group assignments improve the reliability of crystallochemical comparisons across related structures.
• This work provides a more accurate structural foundation for understanding the properties and relationships of these materials.
• Accurate crystallographic data is essential for advancing materials science and coordination chemistry.