Tag

Chemical Bonds

All articles tagged with #chemical bonds

science4 months ago•54 min saved

Electron Diffraction Reveals Partial Charges

The article introduces iSFAC modelling, an innovative experimental method using 3D electron diffraction to determine absolute partial charges of atoms in molecules, applicable across various chemical classes. It enhances understanding of chemical bonds by capturing the influence of the chemical environment, aligns well with quantum-mechanical calculations, and offers insights into molecular interactions and properties, even in inorganic structures like zeolites.

via Nature|

#chemical-bonds #crystal-structure #electron-diffraction

science-and-technology2 years ago•5 min saved

"Harnessing Nature's Power to Disrupt Synthetic Chemical Bonds"

Scientists have successfully engineered an enzyme capable of breaking man-made silicon-carbon bonds found in widely used siloxane chemicals, marking a significant step towards making these chemicals biodegradable. The breakthrough, achieved through directed evolution, could lead to the development of natural organisms or improved enzymes that can degrade siloxanes, which are present in various household and industrial products. The research, published in the journal Science, offers promising implications for environmental and health safety, as siloxanes are known to persist in the environment and pose potential risks.

via Caltech|

#chemical-bonds #directed-evolution #environmental-degradation

chemistry2 years ago•3 min saved

"Unveiling the Hidden Power of Van der Waals Crust in Describing Chemical Bonds"

Researchers in Spain have developed a new parameter called the penetration index, which describes the degree of interpenetration of the van der Waals crusts of two atoms. This parameter can replace previous distance measurements and be applied to a wide range of chemical bonds. The penetration index provides a quantitative measure of the degree of interaction between atoms, independent of their size. It has been successfully applied to hydrogen bonding and other bonding interactions, allowing for more precise descriptions and a better understanding of chemical bonding and structure. However, the method has some limitations when applied to ionic crystals due to its reliance on covalent radii rather than ionic radii.

via Chemistry World|

#bonding-interactions #chemical-bonds #chemistry

science2 years ago•2 min saved

Scientists Push Chemical Bonds to Unprecedented Limits.

Scientists from Durham University and the University of York have twisted molecules to their limits to challenge understanding of chemical bonds. They examined how much twisting the chemical bonding in an aromatic ring could endure before it broke. By creating overcrowded aromatic rings, they found that low levels of overcrowding made the ring twist, but without breaking its aromatic bonding. The researchers found there is a balance point, where the ring jumps back and forth between the aromatic structure and the two smaller rings. The study was funded by the Engineering and Physical Sciences Research Council (EPSRC).

via SciTechDaily|

#aromatic-molecules #chemical-bonds #chemistry