2,10-Dibromo-6-isobutyl-6-methyl­dibenzo[d,f][1,3]dioxepine

In the crystal structure of the title compound, C18H18Br2O2, the two benzene rings of the bridged biphenyl unit are twisted by 38.0 (1)°

3,9-Dibromo-5,7-dihydro­dibenzo[c,e]oxepine

The title compound, C14H10Br2O, is a biphenyl derivative containing a –CH2—O—CH2– bridge in the 2,2′-position. The compound displays a twisted conformation with the two benzene rings making a dihedral angle of 45.02 (5)°, while the central seven-membered ring is in a boat conformation. The mol­ecule lies on a crystallographic twofold axis of symmetry passing through the O atom and bis­ecting the 1,1′ C—C bond

2,10-Dibromo-6,6-dimethyl­dibenzo[d,f][1,3]dioxepine

In the crystal structure of the title compound, C15H12Br2O2, which was synthesized from 2,10-dibromo-2,2′-dihydroxy­biphenyl and 2,2-dimethoxy­propane, the aromatic rings are twisted by 35 (1)°. The heterocyclic ring exhibits a twisted conformation

3,9-Dibromo-6,7-dihydro-5H-dibenzo[c,e]thiepine

In the title mol­ecule, C14H10Br2S, the two benzene rings form a dihedral angle of 48.35 (14)°. The seven-membered ring adopts a boat conformation. In the crystal structure, mol­ecules are related by translation along the b axis and exhibit C—H⋯π inter­actions

2-(5-Bromo­pent­yl)-4-chloro-5-[2-(4-meth­oxy­phen­yl)ethyl­amino]­pyridazin-3(2H)-one

The asymmetric unit of the title compound, C18H23BrClN3O2, consists of two mol­ecules which exhibit different conformations of the pentyl chains [C—C—C—C torsion angles of −60.4 (4) and 175.8 (3)°]. The crysal packing exhibits a chain structure, generated through the O atom of the pyridazinone forming a hydrogen bond with the N—H group of an adjacent mol­ecule

2,2′-Bi[6,6′-dimethyl­dibenzo[d,f][1,3]dioxepine]

The title compound, C30H26O4, is a dimer of 6,6′-dimethyl­dibenzo[d,f][1,3]dioxepine linked by formation of a C—C bond in the para position with respect to one O atom. The dimer is arranged around an inversion centre. As is usually observed in related compounds, the dibenzo group is twisted, the two benzene rings making a dihedral angle of 41.56 (9)°. The seven-membered ring exhibits a twisted conformation