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Page 1
Showing results for ring pi
Search for Xing Pi instead (1 results)
A Planar Five-Membered Aromatic Ring Stabilized by Only Two pi-Electrons.
Kysliak O, Schreiner SHF, Grabicki N, Liebing P, Weigend F, Dumele O, Kretschmer R. Kysliak O, et al. Angew Chem Int Ed Engl. 2022 Aug 1;61(31):e202206963. doi: 10.1002/anie.202206963. Epub 2022 Jun 23. Angew Chem Int Ed Engl. 2022. PMID: 35593009 Free PMC article.
Many chemicals known today are partially or fully aromatic, since a ring framework experiences additional stabilization through the delocalization of pi-electrons. ...Our results prove that aromatic stabilization goes far beyond what has previously been assumed as m …
Many chemicals known today are partially or fully aromatic, since a ring framework experiences additional stabilization through the d …
pi-pi Stacking Interaction of Metal Phenoxyl Radical Complexes.
Oshita H, Shimazaki Y. Oshita H, et al. Molecules. 2022 Feb 8;27(3):1135. doi: 10.3390/molecules27031135. Molecules. 2022. PMID: 35164397 Free PMC article. Review.
pi-pi stacking interaction is well-known to be one of the weak interactions. ...We have focused on a single copper oxidase, galactose oxidase, which has the pi-pi stacking interaction of the alkylthio-substituted phenoxyl radical with the indole rin …
pi-pi stacking interaction is well-known to be one of the weak interactions. ...We have focused on a single copper oxidase, ga …
pi-pi Stacking Interaction in an Oxidized Cu(II) -Salen Complex with a Side-Chain Indole Ring: An Approach to the Function of the Tryptophan in the Active Site of Galactose Oxidase.
Oshita H, Suzuki T, Kawashima K, Abe H, Tani F, Mori S, Yajima T, Shimazaki Y. Oshita H, et al. Chemistry. 2019 Jun 7;25(32):7649-7658. doi: 10.1002/chem.201900733. Epub 2019 May 13. Chemistry. 2019. PMID: 30912194
The X-ray crystal structures of the oxidized Cu(II) complex exhibited the pi-pi stacking interaction of the indole ring mainly with one of the two phenolate moieties. ...The other physicochemical results and theoretical calculations strongly support that the …
The X-ray crystal structures of the oxidized Cu(II) complex exhibited the pi-pi stacking interaction of the indole ring …
1,2,3,5-Tetra-hydro-naphtho-[2,1-c]oxepine.
Lough AJ, Pounder A, Wicks C, Tam W. Lough AJ, et al. IUCrdata. 2020 Mar 5;5(Pt 3):x200288. doi: 10.1107/S2414314620002886. eCollection 2020 Mar. IUCrdata. 2020. PMID: 36339480 Free PMC article.
In the title compound, C(14)H(14)O, the seven-membered ring is in a pseudo-chair conformation. In the crystal, mol-ecules are linked by weak C-HO hydrogen bonds forming layers parallel to (010). In addition, there are weak pi-pi stacking inter-actions between …
In the title compound, C(14)H(14)O, the seven-membered ring is in a pseudo-chair conformation. In the crystal, mol-ecules are linked …
Ring-and-Lock Interactions in Self-Healable Styrenic Copolymers.
Gaikwad S, Urban MW. Gaikwad S, et al. J Am Chem Soc. 2023 May 3;145(17):9693-9699. doi: 10.1021/jacs.3c01199. Epub 2023 Apr 17. J Am Chem Soc. 2023. PMID: 37068169
This behavior is attributed to the favorable interchain interactions between aliphatic nBA side groups being sandwiched by aromatic rings forming ring-and-lock associations driven by pi-sigma-pi (pi-sigma-pi) interactions. Guided by molecular dy …
This behavior is attributed to the favorable interchain interactions between aliphatic nBA side groups being sandwiched by aromatic rings fo …
The effect of pi-pi stacking interaction of the indole ring with the coordinated phenoxyl radical in a nickel(ii)-salen type complex. Comparison with the corresponding Cu(ii) complex.
Oshita H, Suzuki T, Kawashima K, Abe H, Tani F, Mori S, Yajima T, Shimazaki Y. Oshita H, et al. Dalton Trans. 2019 Aug 28;48(32):12060-12069. doi: 10.1039/c9dt01887e. Epub 2019 Jun 28. Dalton Trans. 2019. PMID: 31250847
In order to gain new insights into the effect of the pi-pi stacking interaction of the indole ring with the phenoxyl radical moiety as seen in the active form of galactose oxidase, we have prepared Ni(ii) complexes of a methoxy substituted salen-type ligand c …
In order to gain new insights into the effect of the pi-pi stacking interaction of the indole ring with the phenoxyl ra …
Unprecedented pi...pi interaction between an aromatic ring and a pseudo-aromatic ring formed through intramolecular H-bonding in a bidentate Schiff base ligand: crystal structure and DFT calculations.
Dutta A, Jana AD, Gangopadhyay S, Das KK, Marek J, Marek R, Brus J, Ali M. Dutta A, et al. Phys Chem Chem Phys. 2011 Sep 21;13(35):15845-53. doi: 10.1039/c1cp21047e. Epub 2011 Aug 5. Phys Chem Chem Phys. 2011. PMID: 21818495
The most interesting feature in the supramolecular assembly is the formation of a 'dimer of dimer' motif by pi...pi, CH...pi and N...O/O...O interactions in which the pi...pi interaction involving the aromatic phenyl ring and the intramol …
The most interesting feature in the supramolecular assembly is the formation of a 'dimer of dimer' motif by pi...pi, CH...p …
Carbohydrate - Protein aromatic ring interactions beyond CH/pi interactions: A Protein Data Bank survey and quantum chemical calculations.
Stanković IM, Blagojević Filipović JP, Zarić SD. Stanković IM, et al. Int J Biol Macromol. 2020 Aug 15;157:1-9. doi: 10.1016/j.ijbiomac.2020.03.251. Epub 2020 Apr 5. Int J Biol Macromol. 2020. PMID: 32268187
The geometries of the contacts between monosaccharides and aromatic rings of amino acids found in X-ray crystallography structures, in the Protein Data Bank (PDB), were analyzed, while the energies of the interactions were calculated using quantum chemical method. We found 1913 s …
The geometries of the contacts between monosaccharides and aromatic rings of amino acids found in X-ray crystallography structures, in the P …
pi-Extended indenofluorenes.
Rao MR, Desmecht A, Perepichka DF. Rao MR, et al. Chemistry. 2015 Apr 13;21(16):6193-201. doi: 10.1002/chem.201406646. Epub 2015 Mar 5. Chemistry. 2015. PMID: 25753783
A series of pi-extended aromatic indenofluorene (IF) analogues with naphthalene and anthracene cores have been synthesized through acid-catalyzed intramolecular cyclization. ...All regioisomers exhibited a redshift of their absorption/emission bands relative to the parent …
A series of pi-extended aromatic indenofluorene (IF) analogues with naphthalene and anthracene cores have been synthesized through ac …
Pi-pi interaction between aromatic ring and copper-coordinated His81 imidazole regulates the blue copper active-site structure.
Abdelhamid RF, Obara Y, Uchida Y, Kohzuma T, Dooley DM, Brown DE, Hori H. Abdelhamid RF, et al. J Biol Inorg Chem. 2007 Feb;12(2):165-73. doi: 10.1007/s00775-006-0176-8. Epub 2006 Oct 10. J Biol Inorg Chem. 2007. PMID: 17031705
In this paper we demonstrate that in pseudoazurin (a blue copper protein) the pi-pi interaction between a coordinated histidine imidazole ring and the side chains of aromatic amino acids in the second coordination sphere, significantly influences the properti …
In this paper we demonstrate that in pseudoazurin (a blue copper protein) the pi-pi interaction between a coordinated histidin …
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