Is this a reasonable structure? If not, why not? proposed Lewis molecule structure Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. : Br The correct number is: I Br, Br : No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: Yes, it's a reasonable structure. :F: No, the total number of valence electrons is wrong. BF 3 The correct number is: O :F B F: No, some atoms have the wrong number of electrons around them. .. The symbols of the problem atoms are: Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: * If two or more atoms have the wrong number of valence electrons around them, just enter the chemical :0: :- : : 0 :0:

Is this a reasonable structure? If not, why not? proposed Lewis molecule structure Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. : Br The correct number is: I Br, Br : No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: Yes, it's a reasonable structure. :F: No, the total number of valence electrons is wrong. BF 3 The correct number is: O :F B F: No, some atoms have the wrong number of electrons around them. .. The symbols of the problem atoms are: Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: * If two or more atoms have the wrong number of valence electrons around them, just enter the chemical :0: :- : : 0 :0:

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter1: Bond Angles And Shape

Section: Chapter Questions

Problem 12CTQ: Consider the following flat drawing of methane (CH4) . a. What is HCH bond angle implied by this...

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Consider the following flat drawing of methane (CH4) . a. What is HCH bond angle implied by this drawing if you assume it is flat? b. Are the electron domains of this flat CH4 spread out as much as possible? c. Use model materials to make a model of CH4 (methane). If you assembled it correctly, thefour bonds (bonding electron domains) of your model will be 109.5° apart. d. In which representation, the drawing above or the model in your hand (circle one) are theH’s of CH4 more spread out around the central carbon? e. Confirm that your model looks like the following drawing. The wedgebond represents a bond coming out of the page, and the dash bondrepresents a bond going into the page f. You will often see methane drawn as if it were flat (like on the previous page). Why is thismisleading, and what is left to the viewer’s imagination when looking at such a drawing?
Given the following molecules and/or ions, characterize them according to the formatshown in the table below. The central atom of the molecule/ion is shown in boldface.The central atom or molecules marked with an asterisk (*) do not obey the octet rule. PCl5* OF2 SF4* A=Bonding electronsB= Sigma-bondsC =Nonbonding electron pairsD= Hybrid orbitals havingnonbonding electron pairsE =Hybrid orbitals usedF= 3-D structure (NAME)G =Polar (P) or nonpolar (NP) MOLECULE OR ION LEWIS STRUCTURE A B C D E F G
As article in a journal, Inorganic Chemistry, cites both BF3 and PF3 as examples of flat or planar molecules with bond angles of 120 degrees. Another article reports the F-P-F bond angle as 98 degrees. Which report is consistent with the VSEPR model?? Explain
A classmate of yours is convinced that he knows everythingabout electronegativity. (a) In the case of atoms X and Y havingdifferent electronegativities, he says, the diatomic moleculeX¬Y must be polar. Is your classmate correct? (b) Yourclassmate says that the farther the two atoms are apart in abond, the larger the dipole moment will be. Is your classmatecorrect?
Which model, the ball-and-stick or the space-filling, more effectively showsthe angles between bonds around a central atom?
Draw the Lewis Dot structure for SBr2 (on paper) then answer the questions. How many single bonds are in SBr2? Express as a whole number. How many double bonds are in SBr2 ? Express as a whole number. How many triple bonds are in SBr2? Express as a whole number. How many lone pairs on central atom? Express as a whole number. Is SBr2 linear or bent? Write out word
(a) If these three balloons are all the same size, what angleis formed between the red one and the green one? (b) If additionalair is added to the blue balloon so that it gets larger,will the angle between the red and green balloons increase,decrease, or stay the same? (c) Which of the following aspectsof the VSEPR model is illustrated by part (b): (i) Theelectron-domain geometry for four electron domains is tetrahedral.(ii) The electron domains for nonbonding pairs arelarger than those for bonding pairs. (iii) The hybridizationthat corresponds to a trigonal planar electron-domain geometryis sp2. [Section 9.2]
(a) If these three balloons are all the same size, what angleis formed between the red one and the green one? (b) If additionalair is added to the blue balloon so that it gets larger,will the angle between the red and green balloons increase,decrease, or stay the same? (c) Which of the following aspectsof the VSEPR model is illustrated by part (b): (i) Theelectron-domain geometry for four electron domains is tetrahedral.(ii) The electron domains for nonbonding pairs arelarger than those for bonding pairs. (iii) The hybridizationthat corresponds to a trigonal planar electron-domain geometryis sp2.
Draw the Lewis structures for the following species: (a)CN-; (b) [N3]-; (c) [SCN]- For (b) and (c), there are more than one canonical structure that satisfy the Octet rule, and resonance is likely applied. Which canonical structures do you think would be the major contributor to the overall structure (i.e., resonance hybrid)?
(a) Explain why BrF4- is square planar, whereas BF4- is tetrahedral.(b) How would you expect the H¬X¬H bond angle tovary in the series H2O, H2S, H2Se? Explain. (Hint: The size ofan electron pair domain depends in part on the electronegativityof the central atom.)
How many π bonds are in the molecule below? (Hint: count only p bonds not s bonds)
Consider the hypothetical molecule PHFBr, in which the phosphorus atom is in the center.This molecule has exactly one central atom. d) Is the P-F bond ionic, polar covalent, or nonpolar covalent? How did you decide?e) Do you expect the PHFBr molecule to be polar or nonpolar? Justify your answer.f) Which of the following intermolecular forces should be considered between PHFBrmolecules: Dipole-dipole force, ion-dipole force, London Dispersion Force, or Hydrogenbonding? List all the forces that are appropriate below.