I-X bonds

The broken bonds (boldface = dissociated fragment) BDEs (boldface = recommended data reference in parentheses) Methods (reference in References 

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Interaction of the C(l)—X pyranosyl derivative with (a) the p-type lone pair on oxygen when the C(l)-—X bond is axial and (b) the sp-type lone pair on oxygen when the C(I)—X bond is equatorial... 

Other TeIV organo compounds are of the R2TeX231 and RTeX3 types. These may associate through secondary /i-X bonds to dimers. By reaction of Ph3TeF with XeF2 it is oxidized to Ph3TeF3, which has a meridional octahedral structure. 

The Dewar-Golden-Harris approach (DGH), also called FMMF method (i.e.. Field, Meso-meric, and Mesomeric-Field method) is a modification of the Dewar-Grisdale approach, where the substituent X is approximated by a finite dipole (represented by two point charges along the i—X bond) and the reaction site at positionj as a single point charge [ Dewar, Golden et al., 1971]. 

The complexes of ICl and IBr with pyridine bases show a very small asymmetry parameter consistent with a linear N-I-X bond [93]. The bonding parameters derived from and d (Table 15.4) are very similar to those... 

If an Sj 2, oxidative addition mechanism is realized (path a), the ] I C and ] I X bonds are formed during two separate steps of the reaction (steps ai and 02) resulting in a reaction product with an octahedral metal configuration. An expected five coordinate intermediate can actually be stabilized by coordination of a solvent molecule (Sol) as shown in structure 4. The configuration of the carbon atom in R-Z is inverted at the step aj. Importantly, from both synthetic and mechanistic points of view, if a ligand Y more nucleophilic than Z is present in the reaction mixture in sufficient concentration, the intermediate 4 can be intercepted by to produce a LnM (R)Y complex (1) ... 

Nickel insertion into C(i/) )-X bonds is a well-known process. Equation (28) shows an example of oxidative... 

Transfer of aryl groups to palladium(ii) centers with the formation of arylpalladium(iv) complexes has been established.The first identified transfer of Ph from diphenyliodonium(iii) triflate (Scheme 26) to the metallacyclic complex [Pd(C4H8)(bpy)] led to the formation of a new phenylpalladium(iv) bond, providing easy access to species such as [Pd(OTf)G4H8(Ph)(bpy)] 163. This elegant procedure features a model reaction for suggested reactions of C(i/) )-X bonds with Pd(ii) substrates. " "" ... 

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