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2016 ; 6
(ä): 22204
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High Throughput Profiling of Molecular Shapes in Crystals
#MMPMID26908351
Spackman PR
; Thomas SP
; Jayatilaka D
Sci Rep
2016[Feb]; 6
(ä): 22204
PMID26908351
show ga
Molecular shape is important in both crystallisation and supramolecular assembly,
yet its role is not completely understood. We present a computationally efficient
scheme to describe and classify the molecular shapes in crystals. The method
involves rotation invariant description of Hirshfeld surfaces in terms of of
spherical harmonic functions. Hirshfeld surfaces represent the boundaries of a
molecule in the crystalline environment, and are widely used to visualise and
interpret crystalline interactions. The spherical harmonic description of
molecular shapes are compared and classified by means of principal component
analysis and cluster analysis. When applied to a series of metals, the method
results in a clear classification based on their lattice type. When applied to
around 300 crystal structures comprising of series of substituted benzenes,
naphthalenes and phenylbenzamide it shows the capacity to classify structures
based on chemical scaffolds, chemical isosterism, and conformational similarity.
The computational efficiency of the method is demonstrated with an application to
over 14 thousand crystal structures. High throughput screening of molecular
shapes and interaction surfaces in the Cambridge Structural Database (CSD) using
this method has direct applications in drug discovery, supramolecular chemistry
and materials design.