Complexes trans-[MCl2(NCNMe2)2] (M = Pt 1, Pd 2) were cocrystallized with CHBr3 and CHI3, forming 1:2 adducts isomorphic with previously reported trans-[PtCl2(NCNMe2)2]·2CHI3. In all cases, the C–X···M (X = Br, I; M = Pd, Pt) metal-involving halogen bonding together with numerous chloride-halomethane halogen and hydrogen bonds were identified by single-crystal XRD experiments. Further DFT calculations and topological analysis of the electron density distribution within the framework of QTAIM method at the M06/DZP-DKH level of theory confirmed the existence of these interactions and their noncovalent nature. Estimated energies of such contacts vary from 1.6 to 3.1 kcal/mol.

Co-crystallization of the dithiocarbamate complexes [MII(S2CNEt2)2] (M = Cu 1, Ni 2, Pd 3, Pt 4) and 1,3,5-triiodotrifluorobenzene (FIB) gives an isomorphic series of (1–4)∙2FIB co-crystals exhibiting the quadruple Cu/Ni/Pd/Pt...

respectively) were cocrystallized with the metal acetylacetonates [M(acac) 2 ] (M = Pd (1), Pt (2)) to give the three adducts 1•2BNPN, 2• 2BNPN, and 1•2INPN, exhibiting reverse arene sandwich solid-state structures. The inspection of the XRD data for the adducts revealed new types of (lone pairBr) bifurcated halogen bonds (XBs) along with some other types of short contacts were recognized. The XRD experiments were supported by Hirshfeld surface analysis and DFT calculations: i.e., topological analysis of the electron density distribution within the framework of the QTAIM method at the ωB97XD/DZP-DKH level of theory. Estimated energies of all studied noncovalent contacts vary from 0.6 to 3.8 kcal/ mol. Article pubs.acs.org/crystal

No abstract

Here, we report the method for copper-catalyzed N-arylation of diverse oxadiazolones by diaryliodonium salts under mild conditions in high yields (up to 92%) using available CuI as a catalyst. The developed method allows utilizing both symmetric and unsymmetric diaryliodonium salts bearing auxiliary groups such as 2,4,6-trimethoxyphenyl (TMP). We found that the steric effects in aryl moieties determined the chemoselectivity of N-and O-arylation of the 1,2,4-oxadiazol-5(4H)-ones. Mesityl-substituted diaryliodonium salts demonstrated the high potential as a selective arylation reagent. The structural study suggests that steric accessibility of N-atom in 1,2,4-oxadiazol-5(4H)-ones impact to arylation with sterically hindered diaryliodonium salts. The synthetic application of proposed method was also demonstrated on selective arylation of 1,3,4-oxadiazol-2(3H)-ones and 1,2,4-oxadiazole-5-thiol.