Interhalogen Compounds

All halogens can combine with each other to form interhalogen compounds with compositions XY, XY3, XY5, and XY7. The central halogen, X, is always the heavier and less electronegative one and, therefore, no interhalogen exists in which fluorine is the central atom - http://www.science-chemistry.com/interhalogen-compounds

Halogen Compounds of Chlorine, Bromine, Iodine and Astatine

A majority of the halides of the pretransition metals in groups 1 and 2 of the periodic table, as well as those of the lanthanides and actinides at the valence states of +2 and +3, are usually ionic compounds - http://www.science-chemistry.com/halogen-compounds-of-chlorine-bromine-iodine-and-astatine

Properties of Chlorine, Bromine, Iodine and Astatine

Chlorine was the first halogen to be isolated and sodium chloride, common salt, has been known from early times as being essential to the human diet; as such it has been mentioned in the Bible - http://www.science-chemistry.com/molecular-properties-of-chlorine-bromine-iodine-and-astatine

Chlorine, Bromine, Iodine and Astatine: Atomic Structure

The elements of group 17, fluorine, chlorine, bromine, iodine, and astatine, are collectively called the halogens and these are the most representative nonmetals in the periodic table - http://www.science-chemistry.com/chlorine-bromine-iodine-and-astatine-atomic-structure

Carbon-Based Molecular Ladders

Structures resembling a ladder are encountered in the chemistry (e.g. Zintl phases) of many elements, but among group IV elements are found only in the case of carbon. The molecular ladders of carbon chemistry are [n]-ladderanes - http://www.science-chemistry.com/carbon-based-molecular-ladders

Cyanides and Related Compounds

Cyanogen, N≡C–C≡N, is a flammable and toxic gas, mp −28 ◦C, bp −21 ◦C, which is kinetically stable but endothermic (297 kJ mol−1). It has a linear structure with a sufficiently weak C–C bond to allow dissociation into •CN radicals - http://www.science-chemistry.com/cyanides-and-related-compounds

Carbon–Sulfur Derivatives

The raw material for much of carbon–sulfur chemistry is carbon disulfide, CS2, a very flammable and reactive liquid, mp −109 ◦C, bp +46 ◦C, which can be synthesized from elemental carbon or methane and sulfur at high temperatures - http://www.science-chemistry.com/carbon-sulfur-derivatives