1995
DOI: 10.1021/ic00117a015
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A Three-Center Hydrogen Bond in 2,6-Diphenylpyridinium Tetrachloroaurate

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Cited by 86 publications
(60 citation statements)
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“…[21] Face-indexed absorption corrections were performed numerically with the program X-RED for 1b and 2. [22] Three oxygen atoms of one ClO 4 -ion in 1b are disordered about two positions [occupancy factors: 0.852(4)/0.148(4)]. SADI (d Cl-O and d O···O ) restraints and EADP constraints were used to model the disorder and for anisotropic refinement.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…[21] Face-indexed absorption corrections were performed numerically with the program X-RED for 1b and 2. [22] Three oxygen atoms of one ClO 4 -ion in 1b are disordered about two positions [occupancy factors: 0.852(4)/0.148(4)]. SADI (d Cl-O and d O···O ) restraints and EADP constraints were used to model the disorder and for anisotropic refinement.…”
Section: Methodsmentioning
confidence: 99%
“…[1][2][3] Metal-bound chlorido ligands have been identified as a very good hydrogen-bond acceptor (in contrast to its organochlorine counterpart), having the potential to interact with hydrogen-bond donors in both a strong (i.e., short) and anisotropic fashion. [4,5] While hydrogen bonds to metal-bound fluorido ligands are even stronger, they also exhibit a distinct angular preference for larger H···F-M angles. [6] Intermolecular D-H···X-M (D = N, O; X = F, Cl, Br, I) interactions are increasingly applied in molecular recognition, crystal engineering and the noncovalent assembly of metallosupramolecules, [7,8] while intramolecular D-H···X-M motifs involving pendant nonligating hydrogen-bonding groups allow the stabilization of unusual ligands, such as HF, at a metal ion.…”
Section: Introductionmentioning
confidence: 99%
“…Basizit‰ten der freien Elektronenpaare sind unterschiedlich (Schema 3), [73] und XÀH ¥¥¥ ClÀM-Wasserstoffbr¸cken werden in Kristallen meistens ungef‰hr senkrecht zur M-Cl-Bindung gebildet (Winkelbereich 808 ± 1408). [73,74] Als Ausnahme unter den metallgebundenen Halogenatomen weist Fluor ein deutlich isotroperes Verhalten auf.…”
Section: Richtungseigenschaften Des Acceptorsunclassified
“…[75] Das komplizierteste ± und noch nicht vollst‰ndig beschriebene ± Richtungsverhalten weisen die p-Acceptoren auf. [73] telpunkt der Dreifachbindung gerichtet, sie kˆnnen aber auch auf eines der beiden C-Atome zeigen. Die freien Elektronenpaare von metallgebundenen Halogenatomen.…”
Section: Richtungseigenschaften Des Acceptorsunclassified
“…The shorter nature of the hydrogen bond interaction in 4-F is presumably because the interaction, in this case, is with the radially less diffuse sp lone pair of the fluoride ligand. Work by others [34,35] on MϪCl systems, however, has shown a preference for the p-type lone pair to be more basic and interact with a hydrogen-bond donor (angular preference 100Ϫ110°). [35] This type of donor approach is ruled out in this system because of the steric bulk of the ancillary ligand set.…”
Section: The Solid-state Structures Of 4-br 4-cl 4f 4-imentioning
confidence: 99%