The Fischer projection and line formula for L-threonine is to be drawn. Concept Introduction: The absolute configuration of a chirality center is its three dimensional spatial arrangement of the substituents attached to it. When determining the configuration of a chiral center, the atoms or groups attached to it are first assigned priorities on the basis of their atomic numbers . If two atoms attached to the chiral center have the same atomic number, then they are compared on the basis of the atomic numbers of the atoms attached to them. The molecule is oriented, such that the lowest ranked group points away from the observer. If the remaining three groups in order of the decreasing priority trace a clockwise path, the configuration is R. If the remaining three groups in order of the decreasing priority trace a counter clockwise path, the configuration is S.

Question

Want to see the full answer?

Answer 1

Question

Chapter 26.2, Problem 3P

Interpretation Introduction

Interpretation:

The Fischer projection and line formula for L-threonine is to be drawn.

Concept Introduction:

The absolute configuration of a chirality center is its three dimensional spatial arrangement of the substituents attached to it.

When determining the configuration of a chiral center, the atoms or groups attached to it are first assigned priorities on the basis of their atomic numbers.

If two atoms attached to the chiral center have the same atomic number, then they are compared on the basis of the atomic numbers of the atoms attached to them.

The molecule is oriented, such that the lowest ranked group points away from the observer.

If the remaining three groups in order of the decreasing priority trace a clockwise path, the configuration is R.

If the remaining three groups in order of the decreasing priority trace a counter clockwise path, the configuration is S.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

For CARS, which statement is not true regarding its advantages? a) Contrast signal based on vibrational characteristics, no need for fluorescent tagging. b) Stronger signals than spontaneous Raman. c) Suffers from fluorescence interference, because CARS signal is at high frequency. d) Faster, more efficient imaging for real-time analysis. e) Higher resolution than spontaneous Raman microscopy.

Draw the major product of the Claisen condensation reaction between two molecules of this ester. Ignore inorganic byproducts. Incorrect, 5 attempts remaining 1. NaOCH3/CH3OH 2. Acidic workup Select to Draw O Incorrect, 5 attempts remaining The total number of carbons in the parent chain is incorrect. Review the reaction conditions including starting materials and/or intermediate structures and recount the number of carbon atoms in the parent chain of your structure. OK

Using a cell of known pathlength b = 1.25115 x 10-3 cm, a water absorption spectrum was measured. The band at 1645 cm-1, assigned to the O-H bending, showed an absorbance, A, of 1.40. a) Assuming that water density is 1.00 g/mL, calculate the water molar concentration c (hint: M= mole/L) b) Calculate the molar absorptivity, a, of the 1645 cm-1 band c) The transmitted light, I, can be written as I= Ioexp(-xb), where x is the absorption coefficient (sometimes designated as alpha), Io is the input light, and b is the cell pathlength. Prove that x= (ln10)*x*c d) Calculate x for the 1645 cm-1 band