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The literature value for the specific rotation of (+)-limonene is +124°. Since two enantiomers always have the same magnitude but opposite signs of specific rotation, this means that the specific rotation of (-)-limonene is -124°.

R-Limonene Lab Report – CHEM 22000 – StuDocu

• The literature value of the optical rotation of R-Limonene was at 115.5 +/- 1.0 (1). The value of the specific rotation we obtained was 79.05 degrees. Assuming that our sample is entirely limonene, we can calculate the enantiomeric excess as follows: EE = ( [ɑ]/Literature Value) 100 = (79.05/115.5) 100 = 68.44% Enantiomeric Excess

is the concentration in g/mL. The literature value for the specific rotation of (+)-limonene is +124°. Since two enantiomers always have the same magnitude but opposite signs of specific rotation, this means that the specific rotation of (-)-limonene is -124°.

## What is the specific rotation of limonene?

The specific rotation of (R)-limonene is +11.5o in ethanol.

## What is the literature value for the refractive index of limonene?

Limonene

Names
Solubility in water Insoluble
Solubility Miscible with benzene, chloroform, ether, CS2, and oils soluble in CCl4
Chiral rotation ([α]D) 87–102°
Refractive index (nD) 1.4727

## What is the literature value for the refractive index of limonene at 20 to 25 C )?

0.844 g/mL at 25 °C(lit.) n 20/D 1.471(lit.)

## How do you calculate specific rotation?

To convert an observed rotation to specific rotation, divide the observed rotation by the concentration in g/mL and the path length in decimeters (dm).

## What is the difference between limonene and D-limonene?

Limonene exists in two isomeric forms. They are chemically the same and with nearly identical properties, but each has a unique scent. The first is dlimonene, which smells like a citrus fruit. Dlimonene is the most common and naturally occurring form often used in food, beauty, and medical products.

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## How much Limonene is in an orange peel?

Orange peel oil is high in monoterpenes, and d-limonene is the major component it makes up about 90 percent of this oil (Table 6.11).

1 Orange Peel Oils.

Constituent d-limonene 83–90 65–68 87–93 88–90

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## Is D-limonene a disinfectant?

APPLICATIONS FOR DLIMONENE

Either method will make for a natural yet equally effective industrial-strength “green” surface disinfectant that is ideal for household cleaning. dLimonene functions as a(n): Gentle and Environmentally-Friendly Cleaner.

## Is limonene R or S?

The limonene structure has a chiral center, and thus it is found in nature as two enantiomers the (R)- and (S)-limonene. Isomer (R)- has the characteristic smell of oranges, while the (S)- smells like lemons. In oranges, essential oil comprises 95% of (R)-limonene, whereas lemon peel contains mostly (S)-limonene.

## Is D-limonene soluble in water?

dLimonene alone is not water soluble, and upon rinsing even with hot water, the tar turns into a gooey mess. The fact that it doesn’t mix with water easily makes it a very good floating degreaser for use in waste water pumping stations, parts washer tanks, dip tanks and as a paint thinner.

## What is limonene found in?

Limonene is a chemical found in the peels of citrus fruits and in other plants. It is used to make medicine. Limonene is used for obesity, cancer, and bronchitis, but there is no good scientific evidence to support these uses. In foods, beverages, and chewing gum, limonene is used as a flavoring.

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## Do limes contain limonene?

Limonene is a chemical found in the rind of citrus fruits, such as lemons, limes, and oranges. It is especially concentrated in orange peels, comprising around 97% of this rind’s essential oils ( 2 ). It’s often referred to as d-limonene, which is its main chemical form.

## What is specific rotation of sugar solution?

What do you understand from the specific rotation of sugar solution? Ans. The specific rotation is a measure of the rotation of the said plane of polarization of incident light by a tube of material 1 decimeter long and of concentration 1 g/cc.

## What does the specific rotation depends on?

The specific rotation is a substance-specific physical parameter, which can be determined by a polarimeter. It depends on the temperature and the wavelength of the light. For some samples this value depends on the concentration as well.

## What does specific rotation tell us?

Specific rotation, [α], is a fundamental property of chiral substances that is expressed as the angle to which the material causes polarized light to rotate at a particular temperature, wavelength, and concentration.