Concept explainers
Interpretation:
Lewis structure along with bonding and isomerism in terms of
Concept Introduction:
Valence bond theory: VSEPR theory tells about the shapes of molecules and ions by taking the consideration that the outermost electron pairs are arranged about each atom so that the pairs of electrons are kept at a distance from one molecule to other, thereby minimizing the repulsion of electron-pair.
Lewis structure, otherwise known as Lewis dot diagrams or electron dot structures that show the bond between atoms and lone pairs of electrons that are present in the molecule. Lewis structure represents each atom and their position in structure using the chemical symbol. Excess electrons forms the lone pair are given by pair of dots, and are located next to the atom.
To draw Lewis structure of
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General Chemistry - Standalone book (MindTap Course List)
- Part A) Draw the following lewis structures and give the formal charges for the atoms as well as the number of valence electrons I2 Part B)According to VSEPR theory, why are bonds and lone pairs spaced as far apart as possible? Part C)Why can we ignore the disposition of the lone pairs on terminal atoms? Part D)What are the bond angles for a molecule having an octahedral electronic geometry with two lone pairs and four bonds on the central atom?arrow_forward) Bean hexene is an odor compound used in cosmetics and cleaners. It is also known as leguminal. Its formula is: CH3CH2CHCHCH2CH2OCHCH2CH3 | OCH3 Please draw a Lewis structure for this compound with CORRECT GEOMETRY (use dashes and wedges!) Label all pi bonds in the molecule (if there are any) Indicate the bond angles for the red highlighted section of the molecule. (hint: you may want to keep the main carbon chain in-plane with the page for clarity) For this question, you don’t need to draw out the orbitals.arrow_forwardPredicting the arrangement of electron groups around the central atom of a molecule.arrow_forward
- The concept of valence-shell electron-pair repulsion (VSEPR) is presented in introductory organic chemistry as a way to predict molecular geometries. The idea be- hind VSEPR is that areas of electron density repel each other so that the geometry of bonds and/or lone pairs of electrons around any one atom places these areas as far apart as possible. For four areas of electron density, a tetrahedral geometry is predicted. For three areas of electron density, a trigonal planar geometry is predicted. Two areas of electron density lead to a linear geometry. VSEPR is simply a predictive tool, but in some cases, it gives an incorrect prediction. In these instances, additional insights into bonding are necessary, such as resonance. Interestingly, several important situations are critical to biochemistry where VSEPR breaks down. Two examples are shown here. :O: CH3 H,N H3N CH3 H :0: :0: Histidine The circled nitrogen atoms are predicted by VSEPR to be tetrahedral in geometry because each…arrow_forwardDescribe the bonding (including σ and п bonds) on an N atom in dinitrogen difluoride, N2F2, using valence bond theory.arrow_forwarddescribe the hybridization, bonding and geometry in a molecule of benzene. Explain the stability in terms of two resonance structures.arrow_forward
- The element vibranium (Vb) reacts with pandemonium (Pn) to generate a covalent PnVb4 molecule. If a pandemonium atom has 8 valence electrons and each vibranium atom has 7 valence electrons, draw the Lewis structure of PbVb4. What is the molecular geometry of the PbVb4 molecule? Pn is the central atom.arrow_forwardConsider the molecule NCS-1. Draw the Lewis dot diagram for this molecular ion, including resonance forms if appropriate. Give the hybridization of the central atom.arrow_forwardAnswer the questions in the table below about the shape of the xenon tetrafluoride (XeF4) molecule. How many electron groups are around the central xenon atom? Note: one "electron group" means one lone pair, one single bond, one double bond, or one triple bond. What phrase best describes the arrangement of these electron groups around the central xenon atom? (You may need to use the scrollbar to see all the choices.) 0 (choose one) (choose one) linear bent T-shaped trigonal planar trigonal pyramidal square planar square pyramidal tetrahedral sawhorse trigonal bipyramidal octahedralarrow_forward
- Does your molecular exhibit resonance? If so, show all possible forms. Does your molecule have any isomers? If so, show Lewis structures of them as well. for CH3CH2OHarrow_forwardHow does adding an atom affect the position and angles of existing atoms or lone pairs? How does adding a lone pair affect the position and angles of existing atoms and lone pairs? Is the effect of adding bonded atoms and lone pairs to the central similar? Explain your answer. Describe what is meant by the "Steric #". Explain the difference between the terms "Electron Geometry" and "Molecule Geometry". How does changing a bond to a double or triple bond affect the shape of the molecules? List the molecules in Part III where the real bond angles differ from the theoretical model values. Why do you think the values differ?arrow_forwardExplain what is wrong with each molecular geometry and provide the correct molecular geometry, given the numbers of lone pairs and bonding groups on the central atom. Match the words in the left column to the appropriate blanks in the sentences on the right. a bent a trigonal bipyramidal an octahedral a trigonal planar a square planar a trigonal pyramidal a tetrahedral a seesaw a linear In structure (a), four pairs of electrons give cause lone pair-bonded pair repulsions and would have Reset electron geometry. The lone pair would molecular geometry. Help In structure (b), five pairs of electrons give electron geometry. The lone pair occupies an equatorial position to minimize lone pair-bonded pair repulsions, and the molecule would have molecular geometry. In structure (c), six pairs of electrons give electron geometry. The two lone pairs would occupy opposite positions to minimize lone pair-lone pair repulsions, and the molecule would have molecular geometry.arrow_forward
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