(a) Interpretation: The number of chiral carbon atoms is to be stated in the sugar molecule. The total number of stereoisomers for the sugar molecule is to be stated. Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes and ketones. A carbon atom that has four nonequivalent atoms or groups attached to it is known as chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers.

Question

Given a 1,3-dicarbonyl compound (R1-CO-CH2-CO-R2), indicate the formula of the compound obtaineda) if I add hydroxylamine (NH2OH) to give an isooxazole.b) if I add thiosemicarbazide (NH2-CO-NH-NH2) to give an isothiazole.

Answer 1

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 17, Problem 17.15E

Interpretation Introduction

(a)

Interpretation:

The number of chiral carbon atoms is to be stated in the sugar molecule. The total number of stereoisomers for the sugar molecule is to be stated.

Concept introduction:

Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes and ketones.

A carbon atom that has four nonequivalent atoms or groups attached to it is known as chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers.

Interpretation Introduction

(b)

Interpretation:

The number of chiral carbon atoms is to be stated in the sugar molecule. The total number of stereoisomers for the sugar molecule is to be stated.

Concept introduction:

Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes and ketones.

A carbon atom that has four nonequivalent atoms or groups attached to it is known as chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers.

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Given a 1,3-dicarbonyl compound (R1-CO-CH2-CO-R2), indicate the formula of the compound obtaineda) if I add hydroxylamine (NH2OH) to give an isooxazole.b) if I add thiosemicarbazide (NH2-CO-NH-NH2) to give an isothiazole.

An orange laser has a wavelength of 610 nm. What is the energy of this light?

The molar absorptivity of a protein in water at 280 nm can be estimated within ~5-10% from its content of the amino acids tyrosine and tryptophan and from the number of disulfide linkages (R-S-S-R) between cysteine residues: Ε280 nm (M-1 cm-1) ≈ 5500 nTrp + 1490 nTyr + 125 nS-S where nTrp is the number of tryptophans, nTyr is the number of tyrosines, and nS-S is the number of disulfide linkages. The protein human serum transferrin has 678 amino acids including 8 tryptophans, 26 tyrosines, and 19 disulfide linkages. The molecular mass of the most dominant for is 79550. Predict the molar absorptivity of transferrin. Predict the absorbance of a solution that’s 1.000 g/L transferrin in a 1.000-cm-pathlength cuvet. Estimate the g/L of a transferrin solution with an absorbance of 1.50 at 280 nm.

Answer 2

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 17, Problem 17.15E

Interpretation Introduction

(a)

Interpretation:

The number of chiral carbon atoms is to be stated in the sugar molecule. The total number of stereoisomers for the sugar molecule is to be stated.

Concept introduction:

Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes and ketones.

A carbon atom that has four nonequivalent atoms or groups attached to it is known as chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers.

Interpretation Introduction

(b)

Interpretation:

The number of chiral carbon atoms is to be stated in the sugar molecule. The total number of stereoisomers for the sugar molecule is to be stated.

Concept introduction:

Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes and ketones.

A carbon atom that has four nonequivalent atoms or groups attached to it is known as chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers.

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Check out sample textbook solution

Answer 3

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 17, Problem 17.15E

Interpretation Introduction

(a)

Interpretation:

The number of chiral carbon atoms is to be stated in the sugar molecule. The total number of stereoisomers for the sugar molecule is to be stated.

Concept introduction:

Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes and ketones.

A carbon atom that has four nonequivalent atoms or groups attached to it is known as chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers.

Interpretation Introduction

(b)

Interpretation:

The number of chiral carbon atoms is to be stated in the sugar molecule. The total number of stereoisomers for the sugar molecule is to be stated.

Concept introduction:

Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes and ketones.

A carbon atom that has four nonequivalent atoms or groups attached to it is known as chiral carbon atom. Chiral carbon centers are also called as asymmetric or stereogenic centers.

Expert Solution & Answer

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See solution

Check out sample textbook solution

Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 17, Problem 17.15E

Interpretation Introduction