Using halogen⋯halogen interactions or C/N–H⋯Cl hydrogen bonding to direct crystal packing in tetrachlorophthalic acid with N-heterocyclic compounds

Abstract

Hydrogen bonding patterns and halogen⋯halogen interactions, C/N–H⋯Cl hydrogen bonding in a series of multi-component molecular structures constructed by tetrachlorophthalic acid with N-heterocycles were discussed.

“Anti‐electrostatic” Halogen Bonding between Ions of Like Charge

“…A selection of representative structures which exhibit contacts at least 9 % shorter than the sum of the respective van der Waals radii is depicted in Figure 7 . In the case of compounds 9 , [33] 11 , 13 , [34] 14 , [35] and 15 , [36] the XB donors form infinite chains, the anions of tribromoacetate 12 [37] form a 2D‐honeycomb network, and the dianions 2 are arranged in dimers. It should be also mentioned that due to the relatively weak interaction between anions, the structural features of their self‐associations can be substantially affected by crystal forces and counterions.…”

Robustness of thioamide dimer synthon, carbon bonding and thioamide–thioamide stacking in ferrocene-based thiosemicarbazones

“…IR spectra in the range of 4000-400 cm −1 were obtained using a Thermo Nicolet-6700 FT-IR spectrophotometer. The 1 H and 13 C NMR spectra were recorded on a Bruker spectrometer at 300 MHz and 75 MHz in CDCl 3 , respectively, using residual solvent signals as a reference.…”

“…As function is always related to three-dimensional structure, the quest for supramolecular synthons in three-dimensional networks is one of the main aims of crystal engineers to understand and explore the principles involved in the formation of that particular structure. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] The acquired knowledge can then be used for the deliberate design of novel crystalline materials with desired properties. [21][22][23][24][25][26] For this purpose, however, highly consistent synthons with sufficiently directional intermolecular forces are required.…”

Oxaphosphacyclophanes Constructed from a Bis(triphenylphosphine oxide) Moiety Linked by Dioxyalkyl Chains: Synthesis and Crystal Structures

“…Crystal structures in the thermal ellipsoid model are shown in Figure . Characteristic intermolecular interactions − are summarized in Table , and conformational parameters of crystal are shown in Table S3, respectively. Propylene-linked oxaphosphacyclophane 1 crystallized as a triclinic system with space group P 1̅, and each unit cell included four molecules of 1 .…”