RESUMO
The mol-ecule in the title compound, C15H12N4O2, has a twisted L-shape with the dihedral angle between the aromatic rings of the N-bound benzene and C-bound benzyl groups being 70.60â (9)°. The nitro group is co-planar with the benzene ring to which it is connected [C-C-N-O torsion angle = 0.4â (3)°]. The three-dimensional packing is stabilized by a combination of methyl-ene-C-Hâ¯O(nitro), methyl-ene-C-Hâ¯π(phen-yl), phenyl-C-Hâ¯π(triazol-yl) and nitro-Oâ¯π(nitro-benzene) inter-actions, along with weak π(triazol-yl)-π(nitrobenzene) contacts [inter-centroid distance = 3.8386â (10)â Å]. The importance of the specified inter-molecular contacts has been verified by an analysis of the calculated Hirshfeld surface.
RESUMO
Two independent mol-ecules comprise the asymmetric unit in the title benzoxatellurole compound, C12H17ClOTe. The mol-ecules, with the same chirality at the methine C atom, are connected into a loosely associated dimer by Teâ¯O inter-actions, leading to a {â¯Te-O}2 core. The resultant C2ClO2 donor set approximates a square pyramid with the lone pair of electrons projected to occupy a position trans to the n-butyl substituent. Inter-estingly, the TeIV atoms exhibit opposite chirality. The major difference between the independent mol-ecules relates to the conformation of the five-membered chelate rings, which is an envelope with the O atom being the flap, in one mol-ecule and is twisted about the O-C(methine) bond in the other. No directional inter-molecular inter-actions are noted in the mol-ecular packing beyond the aforementioned Teâ¯O secondary bonding. The analysis of the Hirshfeld surface reveals the dominance of Hâ¯H contacts, i.e. contributing about 70% to the overall surface, and clearly differentiates the immediate crystalline environments of the two independent mol-ecules in terms of both Hâ¯H and Hâ¯Cl/Clâ¯H contacts.
RESUMO
The 1,3,4-oxadiazinane ring in the title compound, C(18)H(18)N(2)O(4), is in a twisted boat conformation. The two carbonyl groups are orientated towards the same side of the mol-ecule. The dihedral angle between the planes of the benzene rings is 76.6â (3)°. Mol-ecules are sustained in the three-dimensional structure by a combination of C-Hâ¯O, C-Hâ¯π and π-π [shortest centroid-centroid distance = 3.672â (6)â Å] inter-actions.
RESUMO
In the two, almost identical, mol-ecules in the asymmetric unit of the title compound [systematic name: (E)-3-methyl-5-(1,2,4a,5-tetra-methyl-1,2,3,4,4a,7,8,8a-octa-hydro-naphthalen-1-yl)pent-2-enoic acid], C(20)H(32)O(2), the rings are trans fused. The cyclo-hexane ring has a chair conformation and the cyclo-hexene ring a distorted half-boat conformation. The two independent mol-ecules are connected into a dimer via O-Hâ¯O hydrogen bonds. The dimers are associated into supra-molecular chains along c via C-Hâ¯O contacts.