Results 11 to 20 of about 29,179,465 (256)

Contribution of C−H⋯π Interactions to Polymorphic Transitions of a Molecular Crystal with Disordered Fragments [PDF]

open access: yes, 2021
Polymorphic transition is important for the functionality of crystalline materials. However, the underlying mechanism remains unclear, especially when the crystal structure contains disordered fragments.
Toru, Asahi   +2 more
core   +2 more sources

Proline-Aromatic Sequences Stabilize Turns via C–H/π interactions in both cis-Proline and trans-Proline [PDF]

open access: yes, 2023
In proteins, proline-aromatic sequences exhibit increased frequencies of cis-proline amide bonds, via proposed C–H/π interactions between the aromatic ring and either the proline ring or the backbone C–Hα of the residue prior to proline.
Michael B., Elbaum   +2 more
core   +2 more sources

Study of C−H⋅⋅⋅π interactions with pyrrole and chelate rings in metal-porphyrin complexes [PDF]

open access: yes, 2006
The Cambridge Structural Database (CSD) was screened in order to find and investigate specific C−H⋅⋅⋅π interactions between C−H groups and two types of rings with delocalized π-bonds that exist in porphyrin: pyrrole and six-membered chelate.
Medaković, Vesna B.   +2 more
core   +6 more sources

A study of $$C\!P$$ C P violation in the decays $${{B} ^\pm } \rightarrow [{{K} ^+} {{K} ^-} {{\uppi } ^+} {{\uppi } ^-} ]_{D} h^{\pm }$$ B ± → [ K + K - π + π - ] D h ± ( $$h = K, \pi $$ h = K , π ) and $${{B} ^\pm } \rightarrow [{{\uppi } ^+} {{\uppi } ^-} {{\uppi } ^+} {{\uppi } ^-} ]_{D} h^{\pm }$$ B ± → [ π + π - π + π - ] D h ± [PDF]

open access: yes, 2023
The first study of $$C\!P$$ C P violation in the decay mode $${{B} ^\pm } \rightarrow [{{K} ^+} {{K} ^-} {{\uppi } ^+} {{\uppi } ^-} ]_{D} h^\pm $$ B ± → [ K + K - π + π - ] D h ± , with $$h=K,\pi $$ h = K , π , is presented, exploiting a data sample of ...
Chavez Barajas, C.A   +999 more
core   +1 more source

Experimental and computational evidence for stabilising parallel, offset π[C(=O)N(H)N=C]⋯π(phenyl) interactions in acetohydrazide derivatives [PDF]

open access: yes, 2022
Parallel, off-set π[C(=O)N(H)N=C] …π(phenyl) interactions are observed in the crystal of (2-thienyl)CH2CON(H)-N=C(H)Ph, along with more conventional non-covalent interactions.
Wardell, James L.   +5 more
core   +1 more source

New determination of the D0→K -π +π0 and D0→K -π +π +π - coherence factors and average strong-phase d [PDF]

open access: yes, 2014
Measurements of the coherence factors (RKππ0 and R K3π) and the average strong-phase differences (δDKππ0 and δDK3π) for the decays D0→K -π +π0 and D0→K -π +π +π - are presented.
Wilkinson, G   +35 more
core   +1 more source

Search for CP violation in the decay D+→π−π+π+ [PDF]

open access: yes, 2013
A search for CP violation in the phase space of the decay D+→π−π+π+ is reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV.
Dossett, D.   +14 more
core   +1 more source

Is π-Single Bonding (C–π–C) Possible? A Challenge in Organic Chemistry. [PDF]

open access: yes, 2023
Conferencia científicaChemical bonding systems determine the nature of molecules. In organic chemistry, there are two bonding types for carbon–carbon connections: σ-bonding and π-bonding.
Abe, Manabu
core  

Crystal structure and Hirshfeld surface analysis of 4-cyano-N-[(4-cyanophenyl)sulfonyl]-N-[2-(5-methylfuran-2-yl)phenyl]benzenesulfonamide

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2023
In the title compound, C25H17N3O5S2, intramolecular π–π interactions [centroid-to-centroid distance = 3.5640 (9) Å] are observed between the furan and benzene rings of the 4-cyanophenyl group.
Gunay Z. Mammadova   +6 more
doaj   +1 more source

Crystal structure of methyl (2Z)-3-(4-chlorophenyl)-2-[(3-methyl-1H-indol-1-yl)methyl]prop-2-enoate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
In the title indole derivative, C20H18ClNO2, the chlorophenyl ring is almost perpendicular to the indole moiety, making a dihedral angle of 87.6 (1)°. The molecular packing is stabilized by C—H...π interactions, which form a C(9) chain motif along [10-1].
S. Selvanayagam   +3 more
doaj   +1 more source

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