Prefixes organometallic compounds

Organometallic compounds are named as substituted derivatives of metals The metal is the parent and the attached alkyl groups are identified by the appropriate prefix... 

The classes listed in Table 1-12 are families which exhibit the same regularity of boiling points, melting points, densities, and other properties seen in the hydrocarbon families we have already studied. Some of the families are named with characteristic suffixes while others have prefixes, or even separate words-in the names. For instance, alcohols are named with the suffix -ol. Ketones are named with the suffix -one. Amine and nitriles are named with the full suffix according to the family name. Ethers and halides usually have the full family name as a separate word, and nitro- and organometallic compounds have the prefix nitro- or the prefix corresponding to the hydrocarbon part of the organometallic molecule. 

Organometallic compounds of the elements of groups 13-16 are named according to the substitutive system of nomenclature, dealt with in Chapter IR-6. Thus, the name of the parent hydride (formed in accordance with the rules of Section IR-6.2) is modified by a prefix for each substituent replacing a hydrogen atom of the parent hydride. The prefix should be in appropriate substituent form (chloro, methyl, sulfanylidene, etc.) and not in ligand form (chlorido, methanido, sulfido, etc.). 

One commonly met feature in organometallic compounds, alluded to earlier, relates to defining the number of atoms involved in bonding of a ligand like cyclopentadienyl (CsHs-), which can involve one, three or all five connected carbon atoms in close (bonding) contact to the metal. The distinction is defined in terms of hapticity (t ), which reports, for example, one (ti1), three (rf) or all five (rf) of the carbon atoms of the ligand coordination as a prefix... 

Molecules containing carboxylic acid functionalities are not confined to organic systems. For example, the C=C double bond in fumaric acid can interact with a low oxidation state metal centre (see Chapter 23) to form organometallic compounds such as Fe(C0)4(r -H02CCHCHC02H) the T -prefix (see Box 18.1) indicates that the two carbon atoms of the C=C bond of the fumaric acid residue are linked to the Fe centre. Hydrogen bonding can occur between adjacent pairs of molecules as is depicted below, and such interactions extend through the solid state lattice to produce an extensive, three-dimensional array. 

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