chair form Medical [′cher‚fȯrm] (physicalchemistry) Aparticularnonplanarconformationof acyclicmoleculewithmorethanfiveatomsinthering;forexample,inthechairformofcyclohexane,thehydrogensarestaggeredanddirectedperpendicularlytothemeanplaneofthecarbons(axialconformation,a) orequatoriallytothecenterofthemeanplane(...
Mimicking cyclohexane chair form via H-bonding in crystal structure of a dihydroxy coumarin derivative: Efficient ratiometric response of F over AcO-CoumarinCrystal structureH-bondingChair formRatiometricPaper stripWe report the crystal structure of 5, 7 -dihydroxy 4-methylcoumarin (HC) and its ...
(chemistry) One of two possible conformers of cyclohexane rings (the other being boat), shaped roughly like a chair. Couch To lower (a spear, for example) to horizontal position, as for an attack. Chair Ellipsis of electric chair The court will show no mercy; if he gets convicted, it'...
However the electronic struc- ture of the graphene layer is greatly affected by the position of the embedded Li ions. It is known that in graphene, the (s, px, py) orbitals of carbon atom combine to form the s (bonding) and s*(anti-bond- ing) orbital, which are well separated in ...
[6,4]Rotane 1 exists in a rigid chair form in the crystal as well as in solution, because it has the highest free energy of activation (ΔG≠ = 156.8 ± 1.1 kJmol−1) among the cyclohexanes for the chair-chair inv... Prof.,Dr.,Lutz,... - 《Angewandte Chemie International Edi...
HC shows an outstanding feature in its crystal structure by forming a hexamer constituting of six O atoms via H-bonding, mimicking the chair form of cyclohexane. The detection limit for HC towards F? and AcO? are 1.12?×?10?8 (M) and 2.55?×?10?7(M) respectively. Interestingly, HC ...
Investigation of the first few coefficients reveals that in this form the even ones are of smaller magnitude because they are more closely related to the cyclomatic number of the graph. On the other hand, the early odd coefficients are the same or ar...
Aliphatic-cored di-1,2,4-triazole ligands form both a metal–organic nanotube (MONT) and a coordination polymer upon reaction with silver nitrate. Control of the conformation of the cyclohexane ring between the triazoles determines the reaction outcome where a boat (formed from bicyclo[2.2.2]...
chair formring flip energyA-value is conventionally defined as the ring flip Gibbs energy of chair conformers in monosubstituted cyclohexanes. It is well accepted in organic chemistry as one of the proxies of steric hindrance of a substituent group with respect to hydrogen. In this paper, the ...
Interestingly, cis‐1,4‐chdc adopts chair form in 1 and boat conformation in 2. This conformational change impacts the DNA binding capacities of the complexes as revealed by spectrophotometry, circular dichroism (CD) spectroscopy and docking studies. The complex 1 having the chair confor...