Conformational isomerism

Structural isomers are further divided into chain isomerism, position isomerism, functional isomerism, metamerism and tautomerism. [1] Chain isomerism is isomers that have the same molecular formula but differ in which the carbon atoms are bonded to each other. For example,

The purpose of this experiment was to perform a wittig reaction, the horner-emmons wittig specifically, reacting an aldehyde with an ylide to make an alkene. This particular variation of the wittig reaction has several advantages: It gives only the trans product; it uses a much milder base that is easier to handle; and it gives a water soluble byproduct which is easy to separate from the product. The reason that these advantages occur is a change in the structure of the ylide. Instead of a tripheylphosphine

Optimize the molecular geometry of a water molecule (H2O) at HF/STO-3G level of theory in Gaussian-09 through the GaussView Visualization software package on the desktops provided. Give optimized bond length lengths and angles using this combination of methods and basis set. Ans. Bond Length = 0.98927 Å and the Bond Angle H-O-H is 100.035 degrees Recalculate the geometry using an alternative method of your own choice. Ans. Using Semi-empirical (PM6) we get a bond length of 0.94911 Å and a Bond

In this experiment, the reduction of 4-tert¬-butylcyclohaxanone was performed using sodium borohydride. To complete this reduction, 0.5010 g of 4-tert¬-butylcyclohaxanone was added to 6.0 mL of methanol and heated until the ketone dissolved completely. Next, 0.0510 g of sodium borohydride was added to the solution. At this time, bubbles formed and an exothermic reaction took place. After the solution was stirred for 20 minutes, 2 mL of sulfuric acid was added to the flask. The solution became white

In cyclohexane, there are two identical chair conformers and cyclohexane has the hydrogen atoms located as the axial and equatorial like what had mentioned at the previous topic. The chair conformers are presents in equal concentration due to the rapid interconversion of the axial groups and equatorial groups. When cyclohexane bears a substituent, the two chair conformers become different to one another as in one conformation, the substituent will locate at the axial location while in the other

connectivity. Image There are four main types of structural isomers. They are known as position isomer, chain isomer, functional group isomers and tautomers. Chain isomers is a type of molecular isomerism seen in carbon compounds; as the number of carbon atoms in the molecule increases, the linkage between the atoms may be a straight

Abstract In this experiment, the nature of linkage isomers will be observed on the example of nitritopentaamminecobalt(III) Chloride and nitropentaamminecobalt(III) Chloride. Their relative stability will be compared on standard conditions and the infrared spectroscopy of both the isomers will be obtained to analyze the characteristic absorption bands for the nitro and nitrito group. Yield for nitritopentamminecobalt(III) Chloride was obtained to be = 1.9221 g(73.24 %) and yield for nitropentamminecobalt(III)

The word Isomer is derived from the Greek words isos meaning "equal", and méros meaning "part" (1). Isomers are compounds that have the same molecular formula, but they are arranged differently in space. This makes each arrangement have its own unique properties. These molecules are considered mirror images of one another and yet produce completely different smells, tastes, and reactions. I am going to discuss three isomers I have in my kitchen every day. These are Carvone, Limonene, and Thymol.

ASSIGNMENT ON PHARMACEUTICAL IMPORTANCE OF STEREOCHEMISTRY PREPARED FOR: Nowshin Nowaz Rumzhum Lecturer, Dept. of pharmacy Stamford University Bangladesh PREPARED BY: Md. Wahid Rezwan ID No: BPH02805674 Batch No: 28th D STAMFORD UNIVERSITY BANGLADESH Introduction: Stereochemistry may seem like a trivial