@conference{
author = "Đorđević, Ivana and Janjić, Goran and Lazić, Anita and Gak, Kristina and Valentić, Nataša and Trišović, Nemanja and Radovanović, Lidija and Rogan, Jelena",
year = "2019",
abstract = "Nekovalentne interakcije imaju značajnu ulogu u formiranju supramolekulskogkristalnog pakovanja molekula. Interakcije koje uključuju atome halogena obezbeđujuslabo, ali visoko usmerenu kontrolu pakovanja molekula u čvrstom stanju. UvođenjeF-atoma može dovesti do značajnih promena u 2D ili 3D strukturama [1], povećanjastabilnosti biomolekula [2] ili poboljšanja dizajna lekova [3]. Da bi se ispitao efekatsupstitucije H-atoma F-atomom, sintetisana su i strukturno okarakterisana dva derivatahidantoina: C15H16N2O3 (1) i C15H15N2O3F (2) (slika).Analiza kristalnih pakovanja 1 i 2 pokazala je da suNH…O i CH…O vodonične veze najbrojnije. U strukturi2 se zbog fluorovanja povećava broj interakcijacikloheksilnog (Ch) i fenil-grupe (Ph) prstena (CH…πinterakcije), kao i između dva Ph prstena (π-πinterakcije). Kvantno-hemijski proračuni na modelsistemima koji predstavljaju dimere derivata hidantoinai izolovanih cikličnih jedinjenja, pokazali su dafluorovanje utiče na stvaranje jačih CH…π i π-πinterakcija. Atom F u 2 učestvuje u formiranju triCH…F i jedne F…F interakcije, što je u saglasnosti sarezultatima Kembridžke baze podataka, koji su pokazalida su najbrojnije CH…F i F…F interakcije, a njihovajačina dostiže vrednost 2 kcal∙mol–1.Kristalogafski podaci: 1, P–1, a = 6,3079(13),b = 10,573(2), c = 11,415(2) Å, α = 67,21(3), β = 78,84(3),γ = 76,16(3)°, R1 = 6,06%; 2, P–1, a = 5,9981(12), b =11,148(2), c = 12,073(2) Å, α = 108,98(3), β = 101,57(3),γ = 105,27(3)°, R1 = 4,82%., Non-covalent interactions have a significant role in supramolecular crystal packingsof the molecules. Halogen interactions provide weak but highly directed control of thepacking of molecules in the solid state. Introduction of F atom can leads to significantdifferences in 2D or 3D structures [1], higher structural stability of biomolecules [2] orimprove drug design [3]. In order to examine the substitution effect of H atom with Fatom, two hydantoin derivatives were synthesized and structurally characterized:C15H16N2O3 (1) i C15H15N2O3F (2) (Figure).Crystallographic analysis of 1 and 2 showed thatNH…O and CH…O hydrogen bonds are the most numerousin their crystal packings. Due to fluoridation in 2, the number of interactions among cyclohexyl (Ch) and phenyl ring(Ph) rings (CH…π interactions), as well as among two Phrings (π-π interactions) is increased. Quantum-chemicalcalculations on the model systems presented by dimmersof hydantoin derivatives and isolated cyclic compounds,verified that fluoridation caused the formation of strongerCH…π and π-π interactions. The F atom in 2 is involved inthree CH…F and one F…F interactions, which is in agreement with the results from the Cambridge Structural Database, which have shown that CH…F and F…F interactionsare the most numerous, and their strength reaches the valueof 2 kcal∙mol–1.Crystallographic data: 1, P–1, a = 6.3079(13),b = 10.573(2), c = 11.415(2) Å, α = 67.21(3), β = 78.84(3),γ = 76.16(3)°, R1 = 6.06%; 2, P–1, a = 5.9981(12),b = 11.148(2), c = 12.073(2) Å, α = 108.98(3), β = 101.57(3), γ = 105.27(3)°, R1 = 4.82%.",
publisher = "Beograd : Srpsko kristalografsko društvo",
journal = "Izvodi radova / XXVI konferencija Srpskog kristalografskog društva, Srebrno jezero, 27–28. jun 2019",
title = "Uloga nekovalentnih interakcija fluora u pakovanju motiva: analiza kristalografskih podataka i kvantno-hemijski proračuni, The role of non-covalent fluorine interactions in packing motifs: crystallographic data analysis and quantum chemical calculations",
pages = "38-39",
url = "https://hdl.handle.net/21.15107/rcub_cer_7541"
}