Naslov
π-Stacking of quinoid rings in crystals of alkali diaqua hydrogen chloranilates

Autori
Molčanov, Krešimir ; Kojić-Prodić, Biserka ; Meden, Anton

Izvornik
CrystEngComm (1466-8033) 11 (2009), 7; 1407-1415

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
π • • • π interactions ; dipolar interactions ; hydrogen bonds ; hydrogenchloranilates ; stacking

Sažetak
The alkali diaqua complexes of hydrogen chloranilic acid of [KHCA(H2O)2], [RbHCA(H2O)2] and [CsHCA(H2O)2], and the salt of NH4HCA·2H2O were prepared and their crystal structures determined. The homologues of lithium and sodium are not stable, but their analogues [LiHCAEtOH] and [Na5HCA(CA)2(H2O)10] were obtained. All crystal structures studied, with exception of [LiHCAEtOH], reveal 3D-hydrogen bond networks with pronounced π⋯π interactions between anions supported by attractive polar interactions ; the shortest separation distance between the centroids [3.229(2) Å] of the hydrogen chloranilate rings in a face-to-face stack is observed in the structure of [KHCA(H2O)2]. The analysis presented is focused on noncovalent interactions, in particular, the influence of cations and hydrogen bonds on the π-stacking of quinoid rings.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

Napomena
Rad je dostupan na internetu od 25. ožujka 2009.

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