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Related Concept Videos

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A chemical symbol is an abbreviation that is used to indicate an element or an atom of an element. For example, the symbol for mercury is Hg. We use the same symbol to indicate one atom of mercury (microscopic domain) or to label a container of many atoms of the element mercury (macroscopic domain).
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In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
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A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural.
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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Applying Cheminformatics to Develop a Structure Searchable Database of Analytical Methods
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Chemist: A Domain-Specific Language by Chemists for Chemists.

Jonathan M Waldrop1, Wibe de Jong2, Edward F Valeev3

  • 1Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, United States.

The Journal of Physical Chemistry. A
|August 15, 2025
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Summary

We introduce Chemist, a new domain-specific language for quantum chemistry (QC) software. Chemist simplifies complex QC tasks, enhancing accessibility and reusability in scientific computing.

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Area of Science:

  • Computational Chemistry
  • Software Engineering

Background:

  • Quantum chemistry (QC) software complexity hinders accessibility, maintainability, and reusability.
  • A lack of modular bottleneck routines in the QC ecosystem is attributed to interface definition challenges.

Purpose of the Study:

  • Introduce the Chemist library, an open-source domain-specific language for quantum chemistry.
  • Address the need for improved interfaces in QC software to manage complexity and enhance modularity.

Main Methods:

  • Developed Chemist as a domain-specific language tailored for the quantum chemistry domain.
  • Focused on performance and user-friendliness in Chemist's design.
  • Utilized hierarchical domain objects for systematic information encapsulation.

Main Results:

  • Chemist enables QC tasks to be defined using familiar concepts like molecules, wave functions, and operators.
  • Key features include extensibility, data aliasing, and succinct definition of common QC tasks.
  • Demonstrated Chemist's utility via NWChemEx's Fock build module interface and a proof-of-concept self-consistent field algorithm.

Conclusions:

  • Chemist offers a solution for managing complexity in quantum chemistry software.
  • The library enhances accessibility, maintainability, and reusability of QC code.
  • Chemist facilitates the development of advanced QC algorithms, including those with uncertainty propagation.