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Specific Rotation of Optically Active Compound Formula

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The Specific Rotation of a compound is an intensive property that is used to quantify the enantiomeric excess of that compound. Check FAQs

[α] D = \frac{α}{l \cdot c}

[α]_D - Specific Rotation?α - Observed Rotation?l - Length Of Sample Tube?c - Concentration of Solution in Polarimeter?

Specific Rotation of Optically Active Compound Example

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Here is how the Specific Rotation of Optically Active Compound equation looks like with Values.

Here is how the Specific Rotation of Optically Active Compound equation looks like with Units.

Here is how the Specific Rotation of Optically Active Compound equation looks like.

11.25 = \frac{45}{2 \cdot 2}

11.25deg.mL.g⁻¹.dm⁻¹ = \frac{45°}{2dm \cdot 2g/mL}

11.25 = \frac{45}{2 \cdot 2}

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Specific Rotation of Optically Active Compound Solution

Follow our step by step solution on how to calculate Specific Rotation of Optically Active Compound?

FIRST Step Consider the formula

[α] D = \frac{α}{l \cdot c}

Next Step Substitute values of Variables

∴

[α] D = \frac{45°}{2dm \cdot 2g/mL}

Next Step Convert Units

∴

[α] D = \frac{0.7854rad}{0.2m \cdot 2000kg/m³}

Next Step Prepare to Evaluate

∴

[α] D = \frac{0.7854}{0.2 \cdot 2000}

Next Step Evaluate

∴

[α] D = 0.00196349540849325rad.m³.kg⁻¹.m⁻¹

LAST Step Convert to Output's Unit

∴

[α] D = 11.25deg.mL.g⁻¹.dm⁻¹

Specific Rotation of Optically Active Compound Formula Elements

Variables

Specific Rotation

The Specific Rotation of a compound is an intensive property that is used to quantify the enantiomeric excess of that compound.

Symbol: [α]_D

Measurement: Specific RotationUnit: deg.mL.g⁻¹.dm⁻¹

Note: Value can be positive or negative.

Formulas to find Specific Rotation

Observed Rotation

Observed rotation is the extent to which plane-polarized light is rotated by a solution of an optically active compound.

Symbol: α

Measurement: AngleUnit: °

Note: Value can be positive or negative.

Formulas to find Observed Rotation

Length Of Sample Tube

Length Of Sample Tube is the measurement or extent of the tube from end to end in the polarimeter.

Symbol: l

Measurement: LengthUnit: dm

Note: Value can be positive or negative.

Formulas to find Length Of Sample Tube

Concentration of Solution in Polarimeter

Concentration of Solution in Polarimeter is the abundance of a constituent divided by the total volume of a mixture.

Symbol: c

Measurement: Mass ConcentrationUnit: g/mL

Note: Value can be positive or negative.

Formulas to find Concentration of Solution in Polarimeter

Other formulas in Optical Activity category

Go Optical Purity

OP = (\frac{[α] obs}{[α] max}) \cdot 100

Go Enantiomeric Excess

ee = | F R - F S |

Go Percent Enantiomeric Excess

%ee = | F R - F S | \cdot 100

Go Fraction of Major Isomer

F R = 50 + (\frac{%ee}{2})

How to Evaluate Specific Rotation of Optically Active Compound?

Specific Rotation of Optically Active Compound evaluator uses Specific Rotation = Observed Rotation/(Length Of Sample Tube*Concentration of Solution in Polarimeter) to evaluate the Specific Rotation, The Specific Rotation of Optically Active Compound formula is defined as the change in orientation of monochromatic plane-polarized light, per unit distance–concentration product, as the light passes through a sample of a compound in solution. Specific Rotation is denoted by [α]_D symbol.

How to evaluate Specific Rotation of Optically Active Compound using this online evaluator? To use this online evaluator for Specific Rotation of Optically Active Compound, enter Observed Rotation (α), Length Of Sample Tube (l) & Concentration of Solution in Polarimeter (c) and hit the calculate button.

FAQs on Specific Rotation of Optically Active Compound

What is the formula to find Specific Rotation of Optically Active Compound?

The formula of Specific Rotation of Optically Active Compound is expressed as Specific Rotation = Observed Rotation/(Length Of Sample Tube*Concentration of Solution in Polarimeter). Here is an example- 64457.75 = 0.785398163397301/(0.2*2000).

How to calculate Specific Rotation of Optically Active Compound?

With Observed Rotation (α), Length Of Sample Tube (l) & Concentration of Solution in Polarimeter (c) we can find Specific Rotation of Optically Active Compound using the formula - Specific Rotation = Observed Rotation/(Length Of Sample Tube*Concentration of Solution in Polarimeter).

Can the Specific Rotation of Optically Active Compound be negative?

Yes, the Specific Rotation of Optically Active Compound, measured in Specific Rotation can be negative.

Which unit is used to measure Specific Rotation of Optically Active Compound?

Specific Rotation of Optically Active Compound is usually measured using the Degree Milliliter per Gram per Decimeter[deg.mL.g⁻¹.dm⁻¹] for Specific Rotation. Radian Cubic Meter per Kilogram per Meter[deg.mL.g⁻¹.dm⁻¹] are the few other units in which Specific Rotation of Optically Active Compound can be measured.

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Specific Rotation of Optically Active Compound Formula

Specific Rotation of Optically Active Compound Example

Specific Rotation of Optically Active Compound Solution

Specific Rotation of Optically Active Compound Formula Elements

Other formulas in Optical Activity category

How to Evaluate Specific Rotation of Optically Active Compound?

FAQs on Specific Rotation of Optically Active Compound

Variable Name