Chemical bonding – Page 4
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ResearchNew type of bond is the first to defy actinide contraction trend
Bonds discovered in metallacycles are unique to the 5f elements
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![An image showing a [2]catenane](https://d2cbg94ubxgsnp.cloudfront.net/Pictures/100x67/0/0/4/504004_fja0c01757_0007.jpeg_49119.jpg)
ResearchMechanical protecting group shields molecules from stress and strain
Catenane makes force-activated molecules more resistant mechanical bond breaking
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![An image showing the bonding pattern of [2]catenane](https://d2cbg94ubxgsnp.cloudfront.net/Pictures/100x67/2/8/7/503287_c9cc09483kf2_286914.png)
ResearchAromaticity lends stability to carbon-only catenanes
Catenanes of newly discovered C18 rings are theoretically possible thanks to the kinetic quirks of aromaticity
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ResearchRhenium plays starring role in bond movie
Controllable energy input from transmission electron microscope captures atoms dissociating and recombining
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ResearchOdd 'entropic bonds' akin to chemical ones can form between nanoparticles
Simulations finds that ’bonding’ can occur in the absence of any electronic interaction
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OpinionWill computers ever discover drugs from scratch?
With enough understanding and computing power, it should be possible, but will it happen?
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ResearchThree centres, two electrons, but how many bonds?
Tweaking Lewis structures allows for a simplified and clearer representation of electron-deficient molecules
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ResearchCarbynes expand the possibilities of carbon–carbon double bonds
Chemists use novel monovalent carbon species to insert functionalities in the middle of double bonds
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ResearchGiant tree molecule made out of 45 rotaxanes switches size on demand
Mechanically interlocked molecules give dendrimer the ability to expand and contract
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ResearchFirst ever synthesis of most double-bond-rich hydrocarbon
Tiny hydrocarbon with six double bonds has unrivalled ability to make complex ring systems though multiple Diels–Alder reactions
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ResearchFirst molecular knots made from just benzene rings
Catenane and trefoil knot are the first mechanically interlocked molecules made from only carbon and hydrogen
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OpinionDo you know about C–H‧‧‧O?
The C–H‧‧‧O hydrogen bond controversy has long been resolved – we should tell our students
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FeatureThe forgotten female crystallographer who discovered C–H⋯O bonds
Andy Extance tells the overlooked story of crystallographer June Sutor, whose C–H⋯O bonding hypothesis was unjustly suppressed
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OpinionThe third degree on actinide covalency
The often ignored elements are attracting chemists’ attention again
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ResearchStudy ranks interactions between hydrogen-bond acceptors and cations
Experiments establish a set of parameters that will help scientists predict the free energies of the interaction between cations and hydrogen-bond acceptors in any solvent with good reliability
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ResearchBond order through a molecular orbital lens
Study computes diatomic bond orders across the periodic table and reveals new bonding insights
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ResearchStrange bonds entirely new to chemists predicted in ammonia hydrides
High pressure compound containing bridging hydrogen cations might be found inside Neptune and Uranus
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ResearchNew family of polymers can be easily recycled and even upcycled
Dynamic covalent bonds means polymers can be taken apart by acid