Buckyball structure

Figure 19 Computer-generated images of carbon nanostructures showing (A) a spherical C60 fullerene Buckyball structure, (B) a conical form, (C) a SWNT and (D) a cylindrical multiwalled CNT MWNT. Abbreviations SWNT, single-walled nanotube MWNT, multiwalled nanotube. Source From Ref. 102.

Computer-generated model of the binding of a buckyball derivative to the site of HIV-protease that normally attaches to a protein needed for the reproduction of HIV. The buckyball structure fits tightly into the active site, thus preventing the enzyme from carrying out its function. 

Buckminsterfullerene (Cm or Buckyball ) is structurally related to corannulene. In which molecule would you expect 7U-orbital overlap be more effective Explain. How many chemically unique carbons are there in C6o Measure CC bond distances. How many unique distances are there Is each benzene fully delocalized or is one resonance contributor more important than the other ... 

Figure 15.2 The structure of a Q 0 fullerene, also called a Buckyball.

There now are known to be a whole family of caged carbon structures having various numbers of carbon atoms, including C30, C50, C7o, C72, C76, Cg4, and the huge C540. The name fullerene has replaced the unwieldy, Buckminsterfullerene used to describe this general spheroid structure of carbon, although they still are referred to as Buckyballs . 

Intermediate between the extended four-coordinate connectivities that dominate the low- T solid phase and the two-coordinate ring/chain connectivities that dominate at higher T are certain //jree-coordinate polyhedral structures that retain a degree of cooperative proton ordering. Two examples of such trigonally coordinated buckyball clusters, a 24-mer and a 28-mer, are shown in Fig. 5.31. The... 

There has also been work with hydrogen storage in buckyballs or carbon nanotubes. These are microscopic structures fashioned out of carbon. This research indicates a potential storage technique using a combination of chemical and physical containment at very high temperature... 

At this time, the fastest growing area in the field of nanophysics is in the studies of buckyballs and nanotubes. After the discovery [33] of the Qo molecule, many properties of the molecule and solids formed from the molecule were explored. The doped C6o crystals showed interesting behavior, including superconductivity. [34] The standard model, including the GW quasiparticle theory, was used [35] successfully to explore the energy band structure, and the superconducting properties appear to be consistent with the BCS theory. [36]... 

Figure 4.19C shows Ceo, which is one type of fullerene discovered in 1985. It was given the name buckminsterfullerene because it resembles the geodesic-domed structure designed by architect R. Buckminster Fuller. Also known as buckyballs, Ceo is just one of several fullerenes that have been discovered. Others have been shown to have the formula C70, C74, and C82. Because of their spherical shape, researchers have speculated that fullerenes might make good lubricants. 

Cgg was named buckminsterfullerene, in honor of the visionary American architect Richard Buckminster Fuller (1895-1983). Fuller is known for developing and promoting the geodesic dome, which resembles. (Buckminsterfullerene molecules are also sometimes called buckyballs.) Later, researchers discovered this molecule belongs to a family of related carbon structures, which have become known as fuller-enes. The smallest fullerene is containing 20 carbon atoms. 

No other allotropic forms of carbon were known until ten years ago then arising from studies of interstellar carbonaceous molecules, a new form of carbon, namely fullerene or buckyballs , was discovered (Kroto et al 1985), for which the authors received the 1996 Nobel Prize for Chemistry. Its structure is basically a ball or spherically shaped cage consisting of pure carbon. The most stable... 

Similar educational opportunities abound for carbon. The diamond and graphite allotropes of carbon have been mainstays of chemistry classes for generations of students and provide a contrast between a three-dimensional structure of great hardness and a two-dimensional structure with lubricant properties, respectively. We now have what can be regarded as zero- and onedimensional counterparts - buckyballs and carbon nanotubes, respectively - with their rich diversity of structural relatives and physicochemical properties (4). These materials are being employed in a variety of nanoscale devices because of their unusual chemical, mechanical and electrical properties. 

BLCKM1NS l ERP LLLERENE (Buckyballs). C60. Spherical aromatic molecule willi a hollow truncated-icosahedron structure, similar to a soccer ball. First reported in the mid 1980s. Capable of enclosing ions or atoms in a host-guest relationship. See also Carbon Compounds. 

Another major center of research on carbon nanotubes has been the Center for Nanoscale Science and Technology at Rice University. The center s director from 1997 to his death in 2005 was Richard Smalley, who was awarded a share of the 1997 Nobel Prize in chemistry for his part in the discovery of a new allotrope of carbon. The discovery, a 60-atom soccer hall-shaped particle originally named buckminsterfullerene, is more commonly known as a buckyball. The structure of a buckyball is shown in the photograph on page 91. 

The Royal Swedish Academy of Science s press release for the Nobel Prize in Chemistry in 1996 announced The discovery of carbon atoms bound in the form of a ball is rewarded. Buckminsterfullerene (C60), the buckyball, has the same structure as the geodesic dome designed by Buckminster Fuller for the 1996 Montreal World Exhibition. It also has exactly the same structure as a European soccer ball. 

One of the most elegant classes of molecules is that of the fullerenes, which are carbon compounds in the form of hollow spheres, constructed of twelve five-sided faces and different numbers of six-sided faces. The smallest fullerene has thirty-two carbon atoms the larger ones have several hundred carbon atoms. The first fullerene was discovered in 1985, by two Americans, Richard Smalley (1943-) and Robert Curl (1933-), and an English chemist, Harry Kroto (1939-). The fullerene with sixty carbon atoms, C60, has a structure similar to the geodesic dome invented by the architect Buckminster Fuller. In a whimsical tribute, the whole class of substances was named after the American architect, and his whole name was used for C60, buckminsterfullerene, or, as it is cheerfully known, the buckyball. Fullerenes are stable and can trap other atoms or small molecules inside their spheres. We have scarcely begun to discover their potential uses. 

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