Inorganic compounds binary molecular

Many simple inorganic molecular compounds are named by using the Greek prefixes in Table D.2 to indicate the number of each type of atom present. Usually, no prefix is used if only one atom of an element is present an important exception to this rule is carbon monoxide, CO. Most of the common binary molecular compounds—molecular compounds built from two elements—have at least one element from Group 16 or 17. These elements are named second, with their endings changed to -ide ... 

How are inorganic compounds held together If inorganic compounds contain only two nonmetal elements, they are bonded covalently and are referred to as molecular binary compoimds. 

Although hydrocarbons are binary molecular compounds, they are not named like the binary inorganic compounds discussed in Section 2.8. Instead, each alkane has a name that ends in -ane. The alkane with four carbons is called butane. For alkanes with five or more carbons, the names are derived from prefixes like those in Table 2.6. An alkane with eight carbon atoms, for example, is octane (CsHig), where the octa- prefix for eight is combined with the -ane ending for an alkane. 

The melting heats AZZm for binary inorganic compounds are presented in Table 9.1, for elements in Table 9.3. Melting heats of organic and organometallic crystals with molecular structures are much smaller. Thus, AH (kJ/mol) = 5.4 for cyclobutane,... 

Solution (a) The compound is named carbon disulfide, in analogy with the naming of ofher binary molecular compounds. (Section 2.8) (b) The substance will be listed as an inorganic compound. It contains no carbon-carbon bonds, nor any C—H bonds, which are fhe usual structural features of organic compounds, (c) Because CS2(s) consists of individual CS2 molecules, it would be a molecular solid in the classification scheme of Table 11.7. (d) The mosf likely producfs of the combustion will be CO2 and SO2. 

In this section, we discuss the nomenclature of some simple inorganic compounds. We hrst look at the naming of ionic compounds. Then, we look at the naming of some simple molecular compounds, including binary molecnlar componnds (molecular compounds of two elements) and acids. Finally, we look at hydrates of ionic compounds. These substances contain water molecules in loose association with ionic compounds. 

The vibrational spectra of inorganic molecular crystals of binary compounds of the type AB and AB2, as well as ionic crystals of complex anions and cations, have been studied recently under pressures up to 70 Kbar (217—219). By this technique it is possible to differentiate between internal and lattice vibrations (220) since lattice modes have a greater dependence on pressure. 

As the valency of the metal increases, the bonding in these simple binary compounds becomes more covalent and the highly symmetrical structures characteristic of the simple ionic compounds occur far less frequently, with molecular and layer structures being common. Many thousands of inorganic crystal structures exist, ffere we describe just a few of those that are commonly encountered and those that occur in later chapters. 

Chapter 1 deals with the kinetics of the dissociation of diatomic molecules and the recombination of atoms, and Chapters 2 and 3 with the reactions of atoms and radicals with molecules, abstraction (metathetical) processes and addition to double and triple bonds. Data for the reactions of metal atoms with a variety of inorganic, organic and metal organic compounds, derived from sodium flame and molecular beam techniques, are discussed in Chapter 4 and rapid substitution at labile metal ions in solution in Chapter 5. The theory of, and the experimental results for, ion-molecule reactions, i.e. chemical processes resulting from binary collisions of positive or negative ions with neutral molecules, are discussed in Chapter 6 and the reactions of solvated electrons in Chapter 7. 

This new inorganic optically active compound has several novel features. Werner s prototype, his "hexol", contained cobalt, a first-row element, and was a cation. F.G. Mann s rhodate, while an anion, contained a second row element. (+) -[Pt(S5)3]2- contains a third-row element. Further, this thioplatinate(IV) shares with the helicene hydrocarbon series the distinction of manifesting molecular optical activity while containing atoms of only two elements. Of course, enantiomorphism is well known in cryst ine binary assemblies (as in ciimabar, HgS, or quartz, Si02) and even in elements (like tellurium). 

---