What is the melting point of cinnamic acid?
What is the melting point of cinnamic acid?
271.4°F (133°C)
Cinnamic acid/Melting point
What is the purpose of bromination of trans cinnamic acid?
Bromination of trans -cinnamic acid can result in the formation of two different pairs of enantiomers (see Figure 4). Fortunately, the pairs of enantiomers have very different melting points. Thus, we can determine the result of this reaction by examining the melting point of the product(s) that we obtain.
What is the product of bromination of cinnamic acid?
In this experiment you will react trans-cinnamic acid with bromine to form 2,3-dibromo-3- phenylpropanoic acid.
Why use of liquid bromine is avoided while carrying out bromination in lab?
The present method of bromination avoids the use of hazardous liquid bromine. Instead, the required bromine is generated in situ and used up quickly. There will be very little pollution by bromine in the laboratory. The use of organic acids instead of mineral acids makes it safer and free from corrosive fumes.
What is the melting point range of salicylic acid?
317.5°F (158.6°C)
Salicylic acid/Melting point
What is the melting point in Celsius of erythro 2 3 dibromo 3 Phenylpropanoic acid?
2,3-DIBROMO-3-PHENYLPROPIONIC ACID Properties Melting point: 200 °C (dec.)( lit.)
What are the different elements present in cinnamic acid?
Cinnamic acid is a monocarboxylic acid that consists of acrylic acid bearing a phenyl substituent at the 3-position. It is found in Cinnamomum cassia. It has a role as a plant metabolite. It is a member of styrenes and a member of cinnamic acids.
What is the melting point of br2?
265.8 K
| Bromine | |
|---|---|
| Phase at STP | liquid |
| Melting point | (Br2) 265.8 K (−7.2 °C, 19 °F) |
| Boiling point | (Br2) 332.0 K (58.8 °C, 137.8 °F) |
| Density (near r.t. ) | Br2, liquid: 3.1028 g/cm3 |
What is the boiling point of bromine?
137.8°F (58.8°C)
Bromine/Boiling point
What happens when trans-cinnamic acid is added to bromine?
This experiment involved the addition of trans-cinnamic acid to bromine for the production of 2,3-dibromo-3-phenylpropanoic acids. This process depicted an electrophilic addition of a halogen to an asymmetrically substituted alkene. A result of this process was the presence of a stereospecific Bromonium ion formed by the mechanism of the reaction.
What happens when bromine is added to an alkene?
When an electrophile, such as bromine, adds to an alkene, the addition can be done in a syn fashion, in which the two groups add to the same side of the molecule, or in an anti fashion, in which the groups add to opposite sides of the molecule.
What is the melting point of bromine added via syn addition?
Had bromine of added via syn addition the melting point would have been near 95 °C (provided in the literature). The difference of several degrees between the literature and the experimental values may be the result of impurities and the possible existence of other enantiomers or compounds in the product.
What is the molecular weight of trans-cinnamic acid?
Trans-cinnamic acid (E-3-phenyl-2-propanoic acid) has a molecular weight of 148 g/mol and a melting point of 133 degrees Celsius. There are several enantiomers of 2,3-dibromo-3-phenylpropanoic acid, they all have a molecular weight of 308 g/mol ( Molecular Weight: 307.96662 to be specific).
