However, these oligomers have very different electronic properties with band gaps below 0.2 eV for the chain [H2PBH2]15 and more than 5 eV for the ring isomer [H2PEH2]15. The MOs in the ring oligomers are highly
Why do covalent compounds have low melting and boiling points ? View Solution Why is HCl predominantly covalent in the gaseous state but is ionic in squeous solution ? View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions ...
Why do alkenes but not alkanes exhibit cis-trans isomerism? Isomers of an alkane do not all have the same boiling point. Thoroughly discuss why isomers have different boiling points. Explain why there are two isomers of 2-butene. Draw their structural formulas and name the isomers....
Why does butane (C4H10) not have a cis or trans isomer yet 2-butene does? Why does 2-Butene have cis and trans isomers but 1-Butene doesn't? Why does 2-butene have cis and trans isomers but 1-butene does not? Why do isomers have different bo...
Notably, the four comparison polymers are all exclusively C-H containing polymers and thus might be expected to have superficially similar degrees of stickiness despite having very different melting points and other bulk molecular properties, and this is what the numbers kind of show, at least when...
The action mechanism of these compounds is vague, and the different strengths directed against other members of the sirtuin family show that they do not target only one conserved enzyme [146], making their classification difficult. For example, suramin, initially considered a synthetic inhibitor of...
do not require additional scaffolds due to the natural properties of cells, such as the ability to self-aggregate, or by methods based on different types of scaffolds (biological scaffolds, polymeric scaffolds, and encapsulation methods). The most common 3D models that do not require additional ...
are molecules with equal molecular formula, but with a different structure (structural isomerism) or different spatial orientation (stereoisomerism). The isomers have an equal number of atoms of each chemical element, but different arrangements of these atoms, and therefore – different properties. ...
statement is true, we should expect to find that the FDAHAS NEVERrecalled Synthroid because of problems with stability or potency, and we would expect that the FDAHASrecalled natural thyroid pills because they are unstable, and vary in potency. So let’s ask the FDA about this. What do we...
Altogether, 44 isomers of C6H6 were identified to have more negative magnetic susceptibility than benzene but were between 67.0 to 168.6 kcal.mol-1 higher in energy than benzene. However, benzene is unique in two ways. Analyzing the paramagnetic contribution to the magnetic susceptibility as ...