Chlorine sigma bond

The complex ion octachlorodirhenate(III) ion has short Re Re distance and eclipsed configuration of the chlorine atom Re(III) is a d4 species. The Re Cl bonds may be considered tcrbe dative bonds from Cl ions to Re3+. The formation of one sigma bond, two pi bonds and one delta bond causes the pairing of four electrons in quadruple bond, hence the complex is diamagnetic. 

The chlorine atom in ClFj is bonded to the three fluorine atoms through sigma bonds and has two nonbonding electron lone pairs. Both lone pairs occupy equatorial positions (the largest angles in a trigonal bipyramid), resulting in a T shape for the molecule. 

The iodide atom is bonded to the four chlorine atoms through sigma bonds and has two sets of lone pairs. The lone pairs are opposite each other, occupying the axial sites of an octahedron. The overall shape of the molecule is square planar. 

Chlorine (CI2) complex with ammonia, 82 sigma bond, 77... 

Olah, continuing his studies on electrophilic reactions at sigma bonds, has described the chlorination (carbon-hydrogen fission) and chlorolysis (carbon-carbon fission) of alkanes. Successive reaction of a thiol with chlorocarbonyl sulphenyl chloride and triphenylphosphine effects conversion into the corresponding alkyl chloride (Scheme 136). 

A compound of chlorine and fluorine, CIF, reacts at about 75°C with uranium to produce uranium hexafluoride and chlorine fluoride, C1F. A certain amount of uranium produced 5.63 g of uranium hexafluoride and 457 mL of chlorine fluoride at 75°C and 3.00 atm. What is x Describe foe geometry, polarity, and bond angles of foe compound and foe hybridization of chlorine. How many sigma and pi bonds are there ... 

The global basis x used in the calculations rejKuted here is again of simple contracted gaussian form it contains four contracted s functions and three sets of contracted p functions on the chlorine atom three contracted s functions and two sets of contracted p functions on the lithium. When the orbitals are written in the matrix form 4> = xT, the first 8 columns of T, namely Toor, define the doubly occupied core orbitals the 3 columns of Tv i define the sigma lone p>air and the two orbitals of the bond pair and the 11 columns of Toom provide the complementary (virtual) space. 

The transfer of a solvated electron to a chlorinated aliphatic hydrocarbon occurs with the simultaneous loss of chloride because tiiere are no available n orbitals available. Therefore, the electron must add to a carbon-chlorine antibonding sigma (a) orbital, thereby breaking the C-Cl bond. This process is called dissociative electron transfer (see Scheme 2). The resulting radical can add a second solvated electron followed by loss of another chloride, as long as a chlorine is still present on that carbon. Ihis is illustrated in Scheme 2 for tire dechlorination of CCI4 in Na/NHa. 

A mechanism for the final step is shown below. Overall, this step constitutes two subsequent electrophUic aromatic substitution reactions, resulting in the formation of two new B-C bonds. Addition of aluminum trichloride, a Lewis acid, serves to enhance the electrophilicity of the boron by forming a complex with one of the chlorine atoms. The boron is then attacked by one of the pendant arenes, with subsequent loss of AlCLt and formation of a resonance-stabilized sigma complex (several, but not all, of the many resonance structures are shown). Deprotonation with AlCl4 restores aromaticity, giving a neutral intermediate. An identical sequence of mechanistic steps (complexation with AICI3, attack of the arene, loss of AlCLt and deprotonation) results in fte formation of the second B-C bond, thus producing compound 3. 

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