1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
notka56 [123]
3 years ago
8

Determine the point groups for a. Ethane (staggered conformation) b. Ethane (eclipsed conformation) c. Chloroethane (staggered c

onformation) d. 1,2-Dichloroethane (staggered anti conformation)
Chemistry
1 answer:
BlackZzzverrR [31]3 years ago
6 0

Answer and Explanation:

Every molecule has a set of <em>symmetry operations</em> that helps in determining its overall symmetry. This set of operations determines the point group of a molecule.

(a) Ethane (staggered conformation)

Ethane in the staggered conformation has:

  • two C_{3} axis (the C-C line)
  • 3 perpendicular C_{2} rotational axis bisecting the C-C line, in the plane of the two C's and H's on the opposite sides of the two C's
  • no σ_{h} plane
  • but has 3σ_{d} planes containing two carbons and anti two hydrogens

<em><u>hence the point group of ethane in staggered conformation is</u></em><u>  </u>D_{3d}<u />

<u />

(b) Ethane (eclipsed conformation)

Ethane in the eclipsed conformation has:

  • two C_{3} axis (the C-C line)
  • three perpendicular C_{2} axis (in the plane of the two C's and H's on the same side of the two C's)
  • mirror planes include σ_{h} and 3σ_{d}

<u><em>Hence the point group of ethane in eclipsed conformation is </em></u>D_{3h}

(c) chloroethane (staggered conformation)

Chloroethane in the staggered conformation has:

  • no rotational axis
  • σ plane containing two carbons and chlorine and the anti hydrogen of Cl

<u><em>Hence the point group of staggered conformation in chloroethane is </em></u>C_{s}<u><em></em></u>

<u><em></em></u>

(c) 1,2-Dichloroethane (staggered anti conformation)

1,2-Dichloroethane in the staggered anti conformation has:

  • C_{2} axis perpendicular to the C-C bond and perpendicular to the plane of Cl-C-C-Cl
  • contain a σ_{h} plane through Cl-C-C-Cl, and an inversion centre

<em><u>Hence the point group in the staggered anti conformation of 1,2-Dichloroethane is </u></em>C_{2h}<em><u></u></em>

You might be interested in
Try the same filtering method with the salt water. What happened? Taste the
enyata [817]

Yeah, what? I don't think Brainly knows that. Maybe you should taste the filtered salt water and find out the answer.

3 0
2 years ago
Read 2 more answers
What are electromagnetic waves, and how can they be seen?
Aleksandr [31]

radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. Your mind interprets the energies of light as different colors, from red to violet.

8 0
3 years ago
The formation of a white cloud
saw5 [17]
Most clouds are white. That's because water and ice particles that make up a cloud have just the right amount and sizes to scatter light in all possible wavelengths. When light of practically all wavelengths combine, the result is white light.
4 0
3 years ago
Potassium metal and chlorine gas combine in a reaction to produce an ionic compound. What is the correct balanced equation for t
Alisiya [41]

Answer:

2K (s) + Cl₂ (g) ⇒ 2KCl (s)

Explanation:

Potassium and chlorine gas combine to form potassium chloride which is an ionic compound. The reaction is a type of combination reaction in which chlorine is being added to the metal, potassium.

Potassium reacts violently with the chlorine which is yellowish green in color to produce white solid of potassium chloride.

The balanced reaction is shown below as:

2K (s) + Cl₂ (g) ⇒ 2KCl (s)

6 0
3 years ago
Read the given expression. X = number of protons − number of core electrons Which of the following explains the identity of X an
shepuryov [24]

<u>Answer: </u>The correct statement is X is the effective nuclear charge, and it increases across a period.

<u>Explanation:</u>

We are given that:

X = number of protons − number of core electrons

Effective nuclear charge is defined as the actual nuclear charge (Z = number of protons) minus the screening effect caused by the electrons present between nucleus and valence electrons. These electrons are the core electrons.

The formula used for the calculation of effective nuclear charge given by Slater is:

Z^*=Z-\sigma

where,

Z^* = effective nuclear charge

Z = atomic number or actual nuclear charge or number of protons

\sigma = Screening constant

The effective nuclear charge increases as we go from left to right in a period because nuclear charge increases with no effective increase in screening constant.

Hence, the correct answer is X is the effective nuclear charge, and it increases across a period.

5 0
3 years ago
Other questions:
  • Argon (Ar): [Ne]3s23p6<br><br> core electrons:__<br> valence electrons:__
    12·2 answers
  • A 0.800 g sample of cuso4 (s was placed in calorimeter with 43.0g of water at an initial temp of 18.3 degrees celcious. as the c
    10·1 answer
  • What method of heat transfer takes place when particles of matter move from one place to another in a liquid
    10·2 answers
  • Helpppppppppppppppppppppppppppp
    9·1 answer
  • Which cell i this illustration is likely to come from a plant?
    10·2 answers
  • Which statement is false? a) When reactants become products, they do so through an intermediate transition state. b) At equilibr
    5·1 answer
  • What are some good movies to watch on HBOMAX
    13·2 answers
  • Which of the following is a chemical change?
    15·1 answer
  • Which of these plants make the enviroment pleasant<br><br> a.sandalwood b.basil c.brahmi
    14·1 answer
  • . how do some deep-sea animals use their bioluminescence, or ability to give off light? (select all that apply.)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!