The 1st Non-IPR Fullerene:

Slides:

Advertisements

Similar presentations

Warmup: Think back to the structure of the atom and draw a Carbon atom

Advertisements

Water and solutions Water Polarity Solubility (like dissolves like)

Discovery and applications of fullerenes

Polarity and Intermolecular Forces Molecular Geometry.

bond formed by the giving or Ionic Bond bond formed by the giving or taking of electrons.

Chapter 8 Homework posted Lab Notes Today’s Topic: Bond Properties (Sec there is no 8.3!) Electron Distribution in Molecules (8.5) November 16, 2009.

Giant Molecular Structures (Or giant covalent structures)

Molecular Compounds Unit 7. Covalent Bonds Sharing pairs of electrons Sharing pairs of electrons Covalent bonds are the intra-molecular attraction resulting.

Class Notes: Chapter 6 sec.2. Polar Molecules Chemical bonding is the result of either an atom sharing one or more electrons with another atom or an atom.

Section 3 ~ Covalent Bonds

Chapters 6, 7, 8, and 9.  Electronic structure of atoms:  Electromagnetic Radiation:

Allotropes of Carbon Topic 4.2. Covalent Crystalline Solids There are substances which have a crystalline structure in which all the atoms are linked.

Cohesion and Surface Tension. Cohesion Cohesion Molecules are attracted to other molecules of the same kind. ◦ For example, as you can see from the picture.

1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Properties of Water Chapter 2, Section 2. Water is a Polar Molecule  the uneven distribution of electrons between the oxygen and hydrogen atoms creates.

Section 2 Covalent Bonding. Covalent Bonds Covalent bonds form  When atoms share electrons to complete octets.  Between two nonmetal atoms.  Between.

 A covalent bond is formed when two atoms share electrons.  Covalent bonds usually form between two or more nonmetals. CO  A molecule is a neutral.

Hψ = E ψ Hamiltonian for the H atom. The wave function is usually represented by ψ.

Polar Bonds and Molecular Shapes Chemistry 11 Ms. McGrath.

Atoms and Molecules. Everything in the world is made out of tiny particles called atoms. Understanding atoms will help us understand DNA.

n n n Group I Group I Metallofullerenes Donate 1 electron to cage M 2n − Distribution similar to empty cages C 60 and C 70 dominant.

2n 2n 2n 2n 2n 2n n

Chapter 3 – Atomic Structure. Elements Ionic Bonding Positively charged sodium is attracted to negatively charged chlorine to form sodium chloride (table.

Intro to Bonding: Part 2: Covalent Compounds (Type 3 Binary Compounds)

End Show Slide 1 of 44 Copyright Pearson Prentice Hall Biology.

Atomic Bonding & Water But first… DO NOW: 1 st : Take out homework so I can check it. Next: Write whether each of the following is an element, compound,

Carbon allotropes. The physical properties depend on the chemical bonding.

Polarity and VSEPR. Covalent Bonding SHARING OF ELECTRONS! Atoms attain an octet (also called noble gas electron configurations) by sharing electrons.

What you’ve learned so far…..  Atoms form bonds in more than one way  In IONIC bonding, atoms give up or gain electrons  In COVALENT bonding, atoms.

Chapter 2 Section 2 Properties of Water

Bonding. Where do electrons live again? In orbitals (or clouds) around the nucleus.

8th 4.2 Ionic and Covalent Bonds

Take out your Homework NOW.

LESSON 2.2 Writing Formulas MgCl2.

Computer-generated model of a 60-carbon molecule enclosing a potassium ion. The 60-carbon molecule, called a buckminster-fullerene, was discovered by organic.

Chapter 2 Chemistry of Life 2.3 Water, Acids, and Bases

O STRUCTURE OF WATER 1 molecule of water is

11.2 Structure of DNA.

Covalent Bonding Lesson Two.

Chemistry of Life Properties of Water.

Properties of Water freezing condensation melting cohesion

Allotropes of Carbon Topic 4.2.

VSEPR Theory Demos sp3 Bonding Balloons Videodisk Unit 3.

Water Most important and abundant biological molecule

11.2 Structure of DNA.

Parts of an atom: Label the diagram

Water Most important and abundant biological molecule

Chemistry of Life Properties of Water.

Water and Diffusion Ch. 6.2.

Covalent Bonding Highlights

Covalent BONDS Chapter 4 Section 2.

Polar Molecules Link to Phet Polar Molecules.

Σ and π bonds σ and π bonds In these images, atomic orbitals and bonds are depicted as line drawings indicating shape and as isosurfaces, regions of space.

Dipoles and Polar Molecules

Aim: How to describe the polarity of bonds and molecules

Chemical Bonding Basic Concepts.

8th 4.2 Ionic and Covalent Bonds

Electron Configurations and PERIODIC TRENDS

Molecular Polarity Just like bonds, molecules can be:

Organic Chemistry.

Covalent Bonding (Molecular Compounds)

Revealing Hidden Phases in Materials

VSEPR Theory Atoms in a molecule try to spread out from one another as much as possible.

Hydrogen and Chlorine:

Bond Polarity and Electronegativity

Why is Water so Cool?.

CfE Higher Chemistry Unit 1 Chemical Changes and Structure

Presentation transcript:

The 1st Non-IPR Fullerene: Sc2@C66 You see here the charge densities of fullerene molecule obtained by the MEM/Rietveld method using the synchrotron powder data. And these are the fullerene structure determined from the charge density. The charge densities clearly exhibit the configuration of 6 and 5-membered rings. What we have here are the pair of the fused pentagon. In addition, the bonding bridge of Sc2 dimmer can be seen through the carbon cage. This was the first report of the finding and determination of the IPR violating fullerene structure. When you see the charge density, you will find the concentration of electron distribution around fused pentagon. This indicates the existence of strong electron polarization in molecule. From the view point of application of metallofullerene, such a unbalanced localized charge distribution found in this Sc2@C66, La2@C82 and Sc@C82 Is expected to produce novel electronic property. C.R.Wang et al. Nature 408(2000)426-427.

3D-Electron Density Distribution of Sc2@C66 as Determined by Synchrotron X-ray Powder Diffraction RF=5.4% Sc-Sc: 2.87(9)Å Sc2 (1.4eÅ-3) Top view Side view