Answer: A chiral centre is defined as an atom in a molecule which is connected to 4 different substituents.
Here in this molecule we see that first and the third carbon is attached to four different species. So, the molecule has 2 chiral centres.
Despite having 2 chiral centres the molecule is achiral because there is a plane of symmetry present. If we draw a plane which is bisecting the second carbon atom, we find that either sides of the plane are identical (since both the methyl groups are poining outwards, we can draw a plane). Therefore the molecule is achiral.
So, cis-1,3-dimethylcyclopentane has 2 chiral centres and is achiral.
H CHỊ How many chiral centers are present in the molecule, cis-1,3-dimethylcyclopentane and is this molecule...
H CH How many chiral centers are present in the molecule, trans-1,3-dimethylcyclopentane and is this molecule chiral or achiral? ICH; H a. There are no chiral centers in this molecule and the molecule is achiral b. There are no chiral centers in this molecule but the molecule is chiral. c. There is one chiral centers in this molecule and the molecule is achiral d. There is one chiral centers in this molecule and the molecule is chiral. e. There are...
NUM 55) How many stereogenic centers are present in the following compound County Name: it Name: A) 1 B) 2 ourse: D) 4 Section: 56) Which of the following molecules are achiral? Exam D) I, II A) I, IV B) II, III C) III, IV 57) Which of the following molecules are chiral? I. cis-1,3-Dibromocyclohexane II. 1-Bromo-1-methylcyclohexane III. trans-1-Bromo-3-methylcyclohexane IV. cis-1-Bromo-3-methylcyclohexane A) II, III B) III, IV C) 1, IV D) 1, 58) Which of the following statements is true?...
4) What term describes the structural relationship between cis-1,2-dimethylcyclopentane and trans-1,3-dimethylcyclopentane? A) not isomers B) constitutional isomers C) enantiomers D) diastereomers E) conformers 5) How many asymmetric carbons are present in the compound below? CH H (CH)CH A)0 B) 1 C) 2 D) 3 E) 4 6) What term describes the structural relationship between (2R,3R,4S)-2,3,4-trichloroheptane and (25,3S,4R)-2,3,4-trichloroheptance? A) not isomers B) constitutional isomers C) enantiomers D) diastereomers E) conformers
6 How many H atoms are present in 1,3-dimethylcyclopentane? a) 8 O b) 9 O c) 10 O d) 12 O e) 14 O f) 16 7 When but-1-ene is reacted with HCI, the result is mainly 1-chlorobutane. O a) true O b) false 8 Aromatic hydrocarbons undergo addition reactions similar to those of alkenes O a) true o b) false
:8. How many chiral centers are in the following molecule? a zero d. four bone e, eight c Two
How many chiral centers are in this molecule? 5. How many chirality centers (stereocenters) are in this molecule? НО то он HO Тон ОН ол до
How many (asymmetric) stereogenic centers are present in the molecule below? CH2OH HO- H HO H H OH CH-он fructose
2) Which of the following incorrectly describes cis-1,2-dimethylcyclopentane? A) It is a meso compound. B) It is achiral. C) It contains two asymmetric carbons. D) Its diastereomer is trans-1,2- dimethylcyclopentane. E) It has an enantiomer.
8. How many chiral carbons are present for the following molecule? CH3 HO–CH2-CH2-C-CH=CH-CH3 NH2 a. 4 b. 3 c. 2 d. 1 e. none
CHEM 22111, Stereochemistry Chiral vs Achiral continued - Label each mon Label each molecule as chiral or Achiral. 3-Methyl cyclohex-1-ene Chiral H M 22111, Stereoche Chiral Ca abeling chira Directions: a) is groups attached PhCH.CH Cheral CH3 Trans- 1,2-dimethyl cyclohexane Achiral Cis-1,2-dimethyl cyclohexane Acharal CH3 - CH₃ IICH3 "CH₃ Praca CH₃ CH3