Organometallic chemistry monodentate ligand

Besides these monodentate ligands, many multidentate ones have been prepared and used in different fields of chemistry and only a few should be mentioned here. Rigid bidentate benzimidazole-based N-heterocyclic carbenes were successfully used to synthesize main-chain conjugated organometallic polymers 23, an interesting class of materials with desirable electronic and mechanical properties (Fig. 9) [110]. 

Hou, Z.M. and Wakatsuki, Y. (2002) Lanthanide(ll)complexes bearing mixed linked and unlinked cyclopentakienyl-monodentate-anionic ligands. Journal of Organometallic Chemistry, 647, 61. 

The most prevalent carbene ligands for organometallic chemistry are monodentate carbenes. Most of the widely used forms of NHCs are either saturated or unsaturated five-membered heterocycles as shown in Figure 11. Many methods have been developed for the preparation of monodentate carbene ligands, and these methods have been covered in several recent Importantly, the steric and electronic nature of the... 

Platinum (II) complexes of the type (COD)PtRX (COD = jj -l,5-cyclooctadiene R, X = alkyl, aryl, halide) are known for many combinations of R and X, and then-reaction chemistry is well developed see Platinum Organometallic Chemistr. The lability of the COD-Pt interaction renders these compounds convenient sources of organoplatinum fragments for coordination to Lewis bases such as phosphines, according to equation (27). In an effort to better understand the factors that influence the stability of bis(phosphine)platinum(II) species, a thermodynamical study of the reaction in equation (27) was undertaken for a series of monodentate and bidentate phosphine ligands of varying steric and electronic character. 

Note - In inorganic chemistry, the most common monodentate L ligands are water, amines, ethers, thiols and sulfides (Chap. 1.1). They are all good donors, because they are not n acceptors. Thus, they are weakly bound to metals, and, as such, also frequently used in organometallic complexes for facile substitution chemistry (see Chap. 5) and catalysis (see Parts IV and V). 

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