**Understanding Newman Projections and Wedge-and-Dash Representations of Molecules**In this educational resource, we will explore the concepts of Newman projections and wedge-and-dash representations of molecules. These models are essential tools in organic chemistry for visualizing the three-dimensional arrangement of atoms in a molecule.**Diagram Analysis:**1. **Newman Projection:** - The Newman projection depicted shows a molecule viewed along the bond axis of carbon atoms labeled C2 and C3. - The front carbon (C2) is represented as a dot, and the green dot indicates this specific carbon. - The substituents on the front carbon include: - OH (hydroxyl group) in the top position. - H (hydrogen atom) on the right. - Me (methyl group) on the left. 2. **Wedge-and-Dash Drawing:** - This model visualizes the molecule with a three-dimensional perspective. - The front carbon (C2) is marked with a green dot, consistent with the Newman projection. - The substituents around the front carbon include: - A carbon chain labeled A. - A substituent B. - A substituent C. - A substituent D. - An F (fluorine atom) coming out towards the viewer (wedge). - An E (another substituent) going away from the viewer (dash).**Question Analysis:**The task is to identify the hydrogen atom (H) on the back carbon (C3) using the given perspective. By examining both representations, students can correlate the spatial positions of various substituents to determine which choice (A, B, C, D, E, or F) aligns with the hydrogen atom on the back carbon.**Key Learning Points:**- Understand how to interpret Newman projections to identify the spatial arrangement of atoms around a specific bond.- Learn to correlate three-dimensional wedge-and-dash models with their two-dimensional Newman projections.- Enhance the ability to visualize and deduce the positions of atoms in complex molecular structures.This illustration aids in comprehending the conformational analysis and stereochemistry of organic molecules, crucial for advanced studies in organic chemistry.

The Newman's projection and the wedge-dash picture of a molecule are interconconverible.

A Newman projection and wedge-and-dash picture of a molecule are shown. The front carbon in the Newman projection is designated with the green dot, and this carbon is also labeled with a green dot in the wedge-and-dash drawing. Looking down the C2- bond from the indicated perspective, which these choices is the H on the back carbon? Me НО. H Me

A Newman projection and wedge-and-dash picture of a molecule are shown. The front carbon in the Newman projection is designated with the green dot, and this carbon is also labeled with a green dot in the wedge-and-dash drawing. Looking down the C2- bond from the indicated perspective, which these choices is the H on the back carbon? Me НО. H Me

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter6: Covalent Bonding

Section: Chapter Questions

Problem 5QRT

See similar textbooks

Similar questions

What is the most polar bond in the molecule?
Complete Table 3 (Remember that the values pertain to the Central atoms only. In this table, you will have more than one central atom so report more than one value, ie. 3 / 3) Table 3 Molecules with Multiple Central Atoms Molecule C2H4 H2O2. CH3OH. CH3NH2 Number of Bond Pairs / / / / Number of Lone Pairs / / / / Number of Electron Domains / / / / Molecular Geometry (Shape) / / / / Bond Angle / / / / Polar or Non-Polar Nonpolar Polar Polar Polar
• Calculate Bond Pairs (BP.s) Calculate Lone Pairs (LP.s) • Draw Lewis Structure for the Simple Molecules and Polyatomic lons Page 228 Text Book) • VSEPR Notation (Pg. 234 T. Book) • Prediction of Molecular Shapes (Pg. 234 T. Book) • Polarity (justify your answer) Pg. 239 (T.Book) 1 H30* 2 3 4 5 CHCI3 -2 CO3 AIF4 + NO₂ 6 7 col 8 9 10 Xe Fz Xe F3+ SO₂ SO3 -2 SO4
Answer the questions in the table below about the shape of the phosgene (COCI,) molecule. How many electron groups are around the central carbon 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 carbon atom? (You may need to use the scrollbar to see all the choices.) (choose one)
Use the Molecule Shape simulator (http://openstaxcollege.org/l/16MolecShape) to build amolecule. Starting with the central atom, click on the double bond to add one double bond. Then add one single bond and one lone pair. Rotate the molecule to observe the complete geometry. Name the electron group geometry and molecular structure and predict the bond angle. Then click the check boxes at the bottom and right of the simulator to check your answers.
1.1 Define electronegativity and explain why electronegativity increases with atomic number within a period of the Periodic Table. 1.2 Describe the type of bonding that exists in F2 (g) molecule. How does this type of bonding differ from that found in the HF (g) molecule? 1.3 Define hydrogen bonding using examples. 1.4 PH3 and NH3 moleculea are the same shape but the molecules are non-polar and polar respectively. Explain why this is so. 1.5 Give an example of molecule that has a coordinate covalent bond. 1.6 Draw a Lewis structure for each of the following molecules of ions: a) HF3 b) CIO3-
4. Lewis dot structures are good tools for showing the arrangement of valence electrons in a molecule. They don't however convey correct information about the shape of a molecule. A student described the shapes of the molecules shown below. Both are incorrect. Write an explanation for this student explaining what he did wrong and giving the correct shape of each molecule based on VSEPR theory. Lewis Structure Student identified molecule geometry as... Н—О—H Linear WATER H H:C:H Square planar H МЕТHANE
place letters in the corner boxes corresponding to all accurate descriptions of the relationship between the two molecules.
Step 1 – Write the Lewis structure from the molecular formula.Step 2 – Assign an electron-group arrangement by counting all electron groups (bonding plus nonbonding) around the central atom (or around each centralatom, if more than one central atom in structure).Step 3 – Predict the ideal bond angle from the electron-group arrangement and the effect of any deviation caused by lone pairs or double bonds.Step 4 – Name the molecular shape by counting bonding groups and nonbonding groups separately.Step 5 – Predict whether the molecule is polar or nonpolarStep 6 – Describe the hybridization around the central atom and identify the total number of σ and π bonds in the structure
Are the following molecules polar? Indicate the polarity of each polar bond and the net dipole of the molecule if there is one. Explain your answer.
2. Explain why CH3F is a polar molecule while CF4 is non-polar.
Please note that "geometry" refers to the molecular or ionic geometry. A. The Lewis diagram for SeOF2 is: :0-Se-F: | F: The electron-pair geometry around the Se atom in SeOF2 is There are lone pair(s) around the central atom, so the geometry of SeOF2 is B. The Lewis diagram for CH4 is: HICIH H-C-H The electron-pair geometry around the C atom in CH4 is There are lone pair(s) around the central atom, so the geometry of CH4 is