Inclusion of the insecticide fenitrothion in dimethylated-β-cyclodextrin: unusual guest disorder in the solid state and efficient retardation of the hydrolysis rate of the complexed guest in alkaline solution

• Dyanne L. Cruickshank,
• Natalia M. Rougier,
• Raquel V. Vico,
• Susan A. Bourne,
• Elba I. Buján,
• Mino R. Caira and
• Rita H. de Rossi

Beilstein J. Org. Chem. 2013, 9, 106–117, doi:10.3762/bjoc.9.14

• molecules and there are no close contacts between the disordered guest molecules and host molecules. Figure 7 shows space-filling diagrams that illustrate representative modes of guest inclusion. Crystal packing is shown in Figure 8. The complex units stack head-to-tail in infinite columns parallel to the x

• ) have site occupancies 0.70 and 0.30, respectively. Stereoview of the three disordered guest components that occupy the cavity of host molecule B. Guest components B (green) and C (blue) have similar orientations while component E (pink) adopts the opposite orientation. Space-filling diagrams showing

The chemistry of bisallenes

• Henning Hopf and
• Georgios Markopoulos

Beilstein J. Org. Chem. 2012, 8, 1936–1998, doi:10.3762/bjoc.8.225

• with its highly space-filling tert-butyl substituent this preference for the “outside” arrangement of the voluminous substituent is clearly more pronounced (vastly preferred formation of 139 over 138). In a remarkable series of investigations Toda and co-workers have investigated the bisallene

Molecular solubilization of fullerene C₆₀ in water by γ-cyclodextrin thioethers

• Hai Ming Wang and
• Gerhard Wenz

Beilstein J. Org. Chem. 2012, 8, 1644–1651, doi:10.3762/bjoc.8.188

• Stokes–Einstein equation. The samples were filtered through a 0.45 μm syringe filter prior to particle-size measurements. Both intensity and volume size distribution curves were calculated from the scattering data by using the software of the instrument. Space-filling model of the most stable complex

Investigation of the network of preferred interactions in an artificial coiled-coil association using the peptide array technique

• Raheleh Rezaei Araghi,
• Carsten C. Mahrenholz,
• Rudolf Volkmer and
• Beate Koksch

Beilstein J. Org. Chem. 2012, 8, 640–649, doi:10.3762/bjoc.8.71

• positions to substitution with small or polar amino acids is evidence for the existence of an enlarged interior cavity formed by extended-backbone amino acids, which requires more-space-filling side chains to exclude the surrounding aqueous solution. Finally, these observations suggest that spot technology

Double N-arylation reaction of polyhalogenated 4,4’-bipyridines. Expedious synthesis of functionalized 2,7-diazacarbazoles

• Mohamed Abboud,
• Emmanuel Aubert and
• Victor Mamane

Beilstein J. Org. Chem. 2012, 8, 253–258, doi:10.3762/bjoc.8.26

• shown. (b) Space-filling views showing the channels along [010] in 3b (up) and [100] in 12c (down). Disordered solvent molecules occupying these channels are not shown. Cross-coupling reactions of bipyridines 2. Ligand effect in the double N-arylation of 2a with 6a. Functionalization of diazacarbazole

Improved syntheses of high hole mobility phthalocyanines: A case of steric assistance in the cyclo-oligomerisation of phthalonitriles

• Daniel J. Tate,
• Rémi Anémian,
• Richard J. Bushby,
• Suwat Nanan,
• Stuart L. Warriner and
• and Benjamin J. Whitaker

Beilstein J. Org. Chem. 2012, 8, 120–128, doi:10.3762/bjoc.8.14

• of theory) the space-filling properties of disordered/fluid n-alkyl and isoalkyl chains are expected to be “much the same”, there have been few studies of the differences between the liquid-crystal properties of n-alkyl and isoalkyl-substituted liquid-crystal derivatives. However, Gray and Kelly have

The cross-metathesis of methyl oleate with cis-2-butene-1,4-diyl diacetate and the influence of protecting groups

• Arno Behr and
• Jessica Pérez Gomes

Beilstein J. Org. Chem. 2011, 7, 1–8, doi:10.3762/bjoc.7.1

• base ligands with a nitro substituent did not lead to a significant increase or loss of metathesis activity. Consequently, in the oleochemical cross-metathesis reaction [Ru]-7 and [Ru]-8 were the most active catalysts due to their space-filling isopropyl substituted Schiff base ligands [31]. The cross

Synthesis and crystal structures of multifunctional tosylates as basis for star-shaped poly(2-ethyl-2-oxazoline)s

• Richard Hoogenboom,
• Martin W. M. Fijten,
• Guido Kickelbick and
• Ulrich S. Schubert

Beilstein J. Org. Chem. 2010, 6, 773–783, doi:10.3762/bjoc.6.96

• lengths and angles for the crystal structures can be found in the supporting information. All structures show the expected bond length and angles. The packing diagrams reveal space filling packing without any π-stacking between the molecules. Polymerizations Since the goal of this research was the

• structures of di-, tetra- and hexa-tosylates were centrosymmetric with ideal space filling packing. The use of tetra- and hexa-tosylates, based on (di)pentaerythritol as initiators for the living cationic ring-opening polymerization (CROP) of 2-ethyl-2-oxazoline, resulted in very slow initiation and ill

Versatile supramolecular reactivity of zinc-tetra(4-pyridyl)porphyrin in crystalline solids: Polymeric grids with zinc dichloride and hydrogen-bonded networks with mellitic acid

• Sophia Lipstman and
• Israel Goldberg

Beilstein J. Org. Chem. 2009, 5, No. 77, doi:10.3762/bjoc.5.77

• ) Wireframe presentation, with the exception of the zinc ions which are depicted as small spheres, illustrating the connectivity scheme. (b) Space-filling view of the coordination polymer. Note that the ZnCl2 bridges and the non-coordinated pyridyl groups point outward from the network. The interporphyrin

• kinks and voids within the polymeric layer, as well as between neighboring layers, are occupied by the TCE solvent (shown as “ball-and-stick” molecules). Space-filling representation of the hydrogen-bonded heteromolecular network in II. Note that every porphyrin unit is in direct hydrogen-bonding

Influence of spacer chain lengths and polar terminal groups on the mesomorphic properties of tethered 5-phenylpyrimidines

• Gundula F. Starkulla,
• Elisabeth Kapatsina,
• Angelika Baro,
• Frank Giesselmann,
• Stefan Tussetschläger,
• Martin Kaller and
• Sabine Laschat

Beilstein J. Org. Chem. 2009, 5, No. 63, doi:10.3762/bjoc.5.63

• groups. The observed maximum phase width for the C5 spacer regardless of the terminal group suggests that for this chain length space filling is optimal and the terminal group X can be accommodated well between the alkyl chains. This model might also explain why the mesophase is lost with strongly polar

Novel banana-discotic hybrid architectures

• Hari Krishna Bisoyi,
• H. T. Srinivasa and
• Sandeep Kumar

Beilstein J. Org. Chem. 2009, 5, No. 52, doi:10.3762/bjoc.5.52

• , the bent core unit will disrupt it owing to its rigidity and high volume fraction compared to the other alkyl chains surrounding the triphenylene disc which otherwise provide space filling effect for columnar mesomorphism. The difluoro compound 8b, has a lower melting point than its hydrocarbon parent