Results 181 to 190 of about 29,301 (244)

Temperature Dependence of the Optical Rotation in Six Bicyclic Organic Molecules Calculated by Vibrational Averaging

ChemPhysChem, 2007
AbstractThe vibrational corrections and the temperature dependence of the specific rotation of six rigid organic molecules (α‐pinene, β‐pinene, cis‐pinane, camphene, camphor, and fenchone) were calculated at three wavelengths using hybrid time‐dependent density functional theory (TDDFT).
Brendan C. Mort, Jochen Autschbach
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ChemInform Abstract: Bicyclic Lithio‐tert‐butylaminofluorosilanes, Molecules with Twofold or Fourfold Coordinated Lithium.

ChemInform, 1988
AbstractThe aminofluorosilanes (I) react with n‐butyllithium (II) to yield the lithium salts (III), which are coupled with tetrahydrofuran (IV) upon recrystallization, forming the stable compounds (V).
Dietmar Stalke, U. Klingebiel, George M. Sheldrick   +2 more
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Recent developments in design and synthesis of bicyclic azasugars, carbasugars and related molecules as glycosidase inhibitors

Chemical Society Reviews, 2013
The importance of glycosidase inhibitors and especially the bicyclic molecules has led to design and assessment of many analogs of naturally occurring molecules. This review focuses on the synthesis and enzyme inhibitions of a few selected (synthetic or non-naturally occurring) molecules that have been reported in the last decade, which allow one to ...
Rima Lahiri, Alafia A. Ansari, Yashwant D. Vankar   +2 more
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Enantiospecific Syntheses of Bicyclic Fragrance Molecules From Verbenone: Enhancing Odour Profiles and Stability

Chemistry – A European Journal
Abstract Fragrances derived from terpenoid scaffolds continue to play a central role in the design of synthetic odorants, with trans ‐fused decalin system providing particularly valuable ambergris like woody notes.
Mahendra R. Shingole, Anisha Suresh, Krishna P. Kaliappan   +2 more
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Long-range coupling in bicyclic molecules

Chemical Communications (London), 1968
Daniel J. Kosman, Leon M. Stock
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New type of geometrical isomerism found in large bicyclic amine molecules

Chemical & Engineering News Archive, 1967

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ChemInform Abstract: DIRECT FLUORINATION OF BICYCLIC MOLECULES

Chemischer Informationsdienst, 1985
AbstractDie direkte Fluorierung von bicycli‐ schen Kohlenwasserstoffen mit elementarem Fluor erfolgt an tertiären C‐Atomen.
C. GAL, S. ROZEN
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Torsional isomerization of biologically active bicyclic molecules

International Journal of Quantum Chemistry, 1979
AbstractRotational isomerization of bipyridines C5H4NC5H4N was studied by CNDO/2, PPP/CI, and CNDO/CI methods. It is shown that CNDO/2 overestimates the angle of rotation ϕ between the pyridine rings ca. two times. The angle ϕ was determined for 2,2′‐bipyridine by means of correlation of the theoretical (CNDO/2) and experimental dipole moment.
Adolph B. Bolotin, Victor A. Bolotin, Victoria L. Gineityte   +2 more
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Reaction of difluorocarbene with small bicyclic molecules

Tetrahedron, 1987
Abstract Difluorocarbene reacts with 1,2,2-trimethylbicyclo [1.1.0] butane to give the product of two bond cleavage, 1,1-difluoro-3,3,4-trimethyl-1,4-pentadiene in 3% yield. Bicyclo [2.1.0]pentane is even less reactive, yielding 1,1-difluorohexa-1,5-diene in ca. 0.5% yield. Bicyclo [3.1.0] hexane does not react with difluorocarbene.
James E. Jackson, Ulf Misslitz, Maitland Jones, A. de Meijere   +3 more
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Large Variations in the Single-Molecule Conductance of Cyclic and Bicyclic Silanes

Journal of the American Chemical Society, 2018
Linear silanes are efficient molecular wires due to strong σ-conjugation in the transoid conformation; however, the structure-function relationship for the conformational dependence of the single-molecule conductance of silanes remains untested. Here we report the syntheses, electrical measurements, and theoretical characterization of four series of ...
Haixing Li, Marc H. Garner, Zhichun Shangguan, Yan Chen, Qianwen Zheng, Timothy A. Su, Madhav Neupane, Taifeng Liu, Michael L. Steigerwald, Fay Ng, Colin Nuckolls, Shengxiong Xiao, Gemma C. Solomon, Latha Venkataraman   +13 more
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