Organometallics classification

Table 19.2 Classification of organometallic ligands according to the number of attached C atoms ...

Fig. 1A-D. Classification of organometallic dendrimers by position of metal atoms...

The organic hgands of the actinide and lanthanide organometallics will be used here as an arbitrary basis of classification. The emphasis will be on the structure and bonding of these compounds rather than their S5uithetic chemistry. Several earher reviews exist which cover the chemical aspects of the organoactinides and -lanthanides [1—7). 

To determine the hardness (softness) of an organometallic reagent R-M, it is assumed that the hardness of the potential anion R parallels that of the cation M. Application of Klopman s formula gives the following classification ... 

For a long time metal carbenes have been either classified as Fischer- or Schrock carbenes, depending on the oxidation state of the metal. Since the introduction of N-heterocycHc carbene complexes this classification needs to be extended because of the very different electronic character of these ligands. Carbenes—molecules with a neutral dicoordinate carbon atom—play an important role in all fields of chemistry today. The first examples in the field of organic chemistry were published by Doering and Hoffmann in the 1950s [1], while Fischer and Maasbol introduced them to organometallic chemists about ten years later [2,3]. But it took another 25 years until the first carbenes could be isolated [4-8]. 

The classification of metals, their salts, and organometallic compounds, based on the Principle of Hard-Soft Acids and Bases (HSAB) of Pearson [112,116,156-158], is discussed in detail in Sec. 1.2.2. 

Figure 2.4 Classification of cr-organometallic compounds. (From Ref. 184k. Reproduced with permission.)...

We propose the following classification (i) organometallic paramagnetic compounds (Sections II and III), and (ii) organometallic reactions, in... 

Structure and Classification of Alcohols 425 10-3 Nomenclature of Alcohols and Phenols 427 10-4 Physical Properties of Alcohols 430 10-5 Commercially Important Alcohols 433 10-6 Acidity of Alcohols and Phenols 435 10-7 Synthesis of Alcohols Introduction and Review 438 Summary Previous Alcohol Syntheses 438 10-8 Organometallic Reagents for Alcohol Synthesis 440 10-9 Addition of Organometallic Reagents to Carbonyl Compounds 443... 

The U.N. classification scheme defines water-reactive substances as substances which are liable to become spontaneously flammable or to give off flammable gases in dangerous quantities by interaction with water. Water-reactive substances include, among others, alkaline metals (Na, K, Li, etc.), hydrogenates, and organometallic compounds. 

---