VSEPR - Bonding and Molecular Geometry

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Discussion Overview

The discussion revolves around the VSEPR (Valence Shell Electron Pair Repulsion) theory, specifically focusing on electron pair geometry, molecular polarity, and bond angles for various chemical species. Participants explore theoretical concepts and provide homework-related inquiries and responses.

Discussion Character

  • Homework-related
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant claims that the electron pair geometry of SCN−, BeCl2, and O3 is linear for both SCN− and BeCl2, while O3 is suggested to be trigonal planar.
  • Another participant asserts that O3 is linear, prompting a request for clarification regarding the presence of a lone pair on the central oxygen atom.
  • A later reply acknowledges the correction regarding O3's geometry, indicating a shift in understanding.
  • Participants question the classification of XeF2 as nonpolar, with one participant stating that its linear and symmetric structure should result in no dipole moment.
  • Another participant reiterates the question about XeF2's nonpolar classification, suggesting a need for further explanation.

Areas of Agreement / Disagreement

There is disagreement regarding the geometry of O3, with differing views on whether it is linear or trigonal planar. Additionally, the classification of XeF2 as nonpolar is contested, with multiple participants seeking clarification on this point.

Contextual Notes

Participants' claims about molecular geometries and polarities depend on interpretations of VSEPR theory and may involve assumptions about lone pairs and molecular symmetry that are not fully articulated.

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Homework Statement


What is the electron pair geometry of the following?
SCN−
BeCl2
O3

The Attempt at a Solution


SCN− Linear
BeCl2 Linear
O3 Trigonal Planar


Homework Statement


Would the following structures be polar or nonpolar? (Not applicable if the structure is an ion. Pick "ionic" in that case).
NO2+
XeF2
ClO2−

The Attempt at a Solution


NO2+ ionic
XeF2 nonpolar
ClO2− ionic


Homework Statement


What is the bond angle at the central atom of the following?
ClF2+
HCN
SO2

The Attempt at a Solution


ClF2+ 109
HCN 180
SO2 120
 
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O3 is linear
 
Can you explain? Isn't there a lone pair in the center Oxygen atom?

IMG00007.GIF
 
Of course you are right, sorry. Was thinking in another question.
 
dextercioby said:
How's XeF2 nonpolar ?

It is linear and symmetric, so can't have a dipole moment.
 

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