The specific rotation for (-)-methylphenidate is -38° mL g¹ dm¯1. Path length of the polarimeter is 1 dm. -1 You dissolve 0.5 g of a mixture of (-)-methylphenidate and its enantiomer in 4 mL of water. You place the sample into a polarimeter and the observed rotation is found to be -0.2°. What percent of the mixture is composed of (-)- methylphenidate? (Round your answer to the nearest whole percent.) The numerical values in this calculation will change with each attempt. Double check before submitting additional attempts.

Q: Draw all the stereoisomers for for structures A and B, label each structure as chiral or achiral and…

A:

Q: COOH HI CH3 HOH,C

A: According to Cahn-Ingold-Prelog rule- 1) More atomic number having more priority.2) If first atom is…

Q: 3) Your results should show that S-mandelic acid rotates light to the right and R-mandelic acid…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Br Ph Br Br. Н. OH H- OH Br S. H- HO Me Ме HO. OH H- OH Но -H HO- OH H OH Но -H- HO OH но HO HO HO.…

A:

Q: 7.(a) Draw and label (i) the enantiomer and (ii) a pair of diasteromers of the following compound.…

A:

Q: percentage of the on of -30°.

A: Percentage of Enantiomeric excess is denoted by %ee %ee for S Enantiomer = [ measure specific…

Q: Describe how a polarimeter can be used to solve the following two problems: a. Differentiate between…

A:

Q: Use compounds D and E shown below to answer this question. What would be the observed rotation of a…

A:

Q: pecific rotation of L-dopa in water is -39.5. The specific rotation of a solution of L-dopa and its…

A:

Q: 2) You isolate limonene from your orange peel via steam distillation, and measure the optical…

A: Given: 1) Sample has an optical rotation of [a]20 = +77.3  2) The literature value of R-(+)-limonene…

Q: Which compound does NOT possess a plane of symmetry? CH3 H H Br Br A X X X S "Br H CH3 Br H H3C I V…

A:

Q: If a substance is known to have a specific rotation of -89.3 deg mL/g dm, what is the concentration…

A: Chiral center present compound shows optical activity,  optically active substances rotate plane…

Q: For the Renantiomer of the molecule, the specific optical rotation is: [a]=+92°g1.cm3.dm 1 A…

A:

Q: 7.(a) Draw and label (a) the enantiomer and (b) a pair of diasteromers of the following compound. OH…

A: There are multipart present for given question,  so as per our guidelines,  I will answer only the…

Q: 12. The specific rotation of compound X shown below is +30: 'N Ph X CH₂ The specific rotation of…

A: A pair of substances which are non-super imposable mirror images are called enantiomers.A pair of…

Q: If the optical rotation of a pure enantiomer A is +10 and the optical rotation of a mixture of two…

A:

Q: MacBook Air Page 14 8. Identify (circle) all the chirality centers in the oral contraceptive,…

A: Details are shown in image.  R/S nomenclature is based on CIP rule which states that higher is the…

Q: When 0.066g of cholesterol is dissolved in 1.00 mL of ether and placed in a sample cell 10.0 cm in…

A: Specific rotation can be calculated using formula: [α] = αobssrved / ( c × l) Where [α] is specific…

Q: Isomer A H3C CH3 CI CH3 H Br P. H Br H CH3 -H A CH₂CI Isomer B H3C CH3 H H Br H Br CH3 $70 CI H H ↓…

A: A molecule is chiral if it has non superimposable mirror image. Chiral molecules don't have plane of…

Q: Chemistry

A:

Q: Define the stereochemistry for each chiral center: Chiral Center 1:            Chiral Center 2:…

A: Chiral Center 1:  (R)        Chiral Center 2:  (S)Chiral Center 3:  (S)       Chiral Center 4:…

Q: 7. a) Identify all the chiral/stereogenic centres in the following molecules. Circle the chiral…

A: Following are the chiral centres and appropriate R/S notation.

Q: Q1: For each of the compounds described by the following names 1. draw a three-dimensional…

A: Hh

Q: Br. t-bu Br H3C CI Br t-bu ČH3 В E a) Are these molecules chiral? In a few sentences, explain your…

A: Chiral carbon is carbon containing 4 different groups.  Molecules with no stereocenters are almost…

Q: 7.(a) Draw and label (i) the enantiomer and (ii) a pair of diasteromers of the following compound.…

A:

Q: a）Name this molecule. Draw another stereoisomer, labelling each chiral atom with the proper…

A: Name : (1S,3S)-1,3-difluorocyclopentane. Another isomer is drawn ( see below). (1R, 3R) is the…

Q: Q18) Enantiomeric purity of a sample should be confirmed. The polarimetry study gave the result of…

A: Since the polarity measurement result is more nearer to the isomer with -ve specific rotation  Hence…

Q: Label all chiral centers in santonin. How many stereoisomers are possible for this molecule?

A: b) Chiral centers but have four unique substituents. They are labeled below.

Q: A sample mixture containing the made-up enantiomers (R)-(+)-Nenanoic acid and (S)-(-)-Nenanoic acid…

A:

Q: 7. The following compound (2,3-dihydroxysuccinic acid) with two chiral centers was synthesized in…

A: The following compound with two chiral centers was synthesized in laboratory. Measurement of its…

Q: TOPIC: POLARIMETRY INSTRUCTIONS: Solve for the observed optical rotation:

A: I am expressing how to calculate the reading of the polarimeter for optical rotation.   To make…

Q: The specific rotation, [a], for sucrose is +67. What is the observed rotation for a solution of 0.70…

A: Given : Specific roation of sucrose = +67 mass of sucrose = 0.70 gvolume of water = 10 mLpath length…

Q: 4. Answer the following question for the molecule shown: (a)How many chirality centers does it have?…

A: Chiral center is that carbon center which has 4 different groups attached to it.  Stereoisomers are…

Q: Consider a mixture that is 38% (+) enantiomer and the rest is the (-) enantiomer. a) In which…

A: Given values : In a mixture of enantiomers : (+) enantiomer =38% (-) enantiomer = 62% specific…

Q: 6. Sucrose is one of the most abundant sugar in the world. About 185 million tonnes of sugar were…

A: Given that: Specific rotation of the sample αsample is +60.1° Specific rotation of the pure sucrose…

Q: 3. If a sample is determined to be 75% of the (+) enantiomer, then what is the enantiomeric excess?…

A: “Since you have posted multiple questions, we will provide the solution  only to the first question…

Q: Determine the absolute Configuration (Rors) of the Stereogenic centre in compounds (i) and (ii)

A:

Q: How many stereocentres are there in quinine, an antimalarial drug? What is the maximum number of…

A: Stereocenter is a carbon atom that are attached with four different groups.

Q: 1) NABH,, ELOH 2) H°, H,O

A:

Q: None

A: Answer image:a-e.The 6 member ring has 6 C atoms, each corner is a c atom and each C atom is bonded…

Q: Molnupiraviris a promising drug candidate that is discovered to treat patients with Covid-19. The…

A: A question based on stereochemistry, which is to be accomplished.

Q: the stereocenter labelled in blue has an  a. R absolute configuration b. S absolute configuration

A: RS nomenclature: The RS nomenclature is an important nomenclature system for denoting the…

Stereochemistry and Isomerism

Stereochemistry deals with the three-dimensional structure and properties of molecules. It explains the arrangement of atoms and their manipulation within a molecule in a 3D structure. Stereochemistry can be dealt with all types of molecules. Based on the stereochemistry of a molecule, the physical and chemical properties of the molecules vary.