Although the title mol-ecule, C(20)H(16)N(2)O(10), does not possess mol-ecular inversion symmetry, it lies on a crystallographic inversion centre which imposes disorder on the central cyclo-hexene ring. In addition, the cyclo-hexene ring has non-symmetry-related disorder over two sites, with the ratio of the major and minor components being 0.54:0.46. The overall effect is to produce four disor...

In the title compound, C23H20BrNO2S, disorder was modeled for the outer two C atoms of the cyclo-hexene ring over two sets of sites with an occupancy ratio of 0.580 (11):0.420 (11). Both rings have a half-chair conformation. The dihedral angles between the mean plane of the thio-phene ring and the benzene and phenyl rings are 9.2 (2) and 66.1 (2)°, respectively. The benzene and phenyl rings are...

The title compound, [Sn(CH(3))(3)(C(7)H(9)O(2))](n), forms an extended zigzag chain structure propagating parallel to [010]. The Sn atom is in a slightly distorted trigonal-bipyramidal coordination environment with two carboxyl-ate O atoms in the axial and the three methyl groups in equatorial sites. The cyclo-hexene ring has a distorted half-boat conformation. There is an intra-molecular C-H⋯O...

A series of microcosm experiments were performed to determine the effectiveness of various gaseous electron donors (including hydrogen, 1-hexene, ethyl acetate, and liquefied petroleum gas [LPG]) for supporting biological perchlorate reduction under different electron donor concentrations and soil moistures. Under high soil moisture (16% w/w) conditions, complete or partial perchlorate degradat...

In the title mol-ecule, C(16)H(14)N(2)O(2), the fused cyclo-hexene and pyran rings adopt an envelope and a flattened boat conformation, respectively. In the crystal, N-H⋯N and N-H⋯O hydrogen bonds link the mol-ecules into corrugated sheets parallel to the bc plane.

The title compound, C(23)H(23)NO, is the product of a tandem transformation of the double Mannich base bis-(1-oxo-1,2,3,4-tertrahydro-2-naphtho-ylmeth-yl)amine hydro-chloride in HBr solution upon heating. The tetra-hydro-pyridine ring has a non-symmetrical half-chair conformation, whereas the cyclo-hexa-diene and cyclo-hexene rings adopt non-symmetrical half-boat conformations. The dihedral ang...

The title compound {systematic name: 5,6,10-trihydr-oxy-7-iso-propyl-1,1,4a-trimethyl-2,3,4,4a-tetra-hydro-phenanthren-9(1H)-one}, C(20)H(26)O(4), is a diterpenoid which was isolated from the roots of Premna obtusifolia. The mol-ecule has three fused six-membered rings; the cyclo-hexane ring is in a twisted-boat conformation and the cyclo-hexene ring adopts a sofa form. Intra-molecular O-H⋯O hy...

To explore the possibility of producing a narrow distribution of mid- to long-chain hydrocarbons from ethylene as a chemical feedstock, co-oligomerization of ethylene and linear α-olefins (LAOs) was investigated, using a previously reported chromium complex, [CrCl(3)(PNP(OMe))] (1, where PNP(OMe) = N,N-bis(bis(o-methoxyphenyl)phosphino)methylamine). Activation of 1 by treatment with modified me...

The interplay between liquid-liquid phase separation (LLPS) and crystallization at several compositions in statistical copolymer blends of poly(ethyleneco-hexene) and poly(ethylene-cobutene) has been examined by optical microscopy (OM), atomic force microscopy (AFM), and differential scanning calorimetry (DSC). The phase contrast optical microscopy shows interconnected bicontinuous structures f...