Group 15 - Arsenic, Antimony, Bismuth

Me2Pb(CN)2 [372], Triphenyllead pyridine-4-thiolate, Ph3PbSCsH4N, forms chains, 146, via Pb- -N secondary bonding [373]. 

Tridimensional polymeric trimethyllead(IV) tetracyanometallates, [(Me3Pb)2-M(CN)4] (M — Fe, Co), similar to the organotin analogs, have also been investigated [314, 374, 375]. In their structures they have extended channels which can serve as hosts for various molecules, e.g. pyridine. 

More lead-containing supramolecular self-assembled structures with soft donors can be expected, but the interest in toxic organolead compounds is currently rather limited. 

---

Group 15 - Arsenic, Antimony, Bismuth 287 4.S.3.2 Organobismuth-oxygen compounds... 

The in-V compounds combine the elements of Group HI (aluminum, gallium, indium) with those of Group V (phosphorus, arsenic, antimony, bismuth). As can be imagined, a wide variety of compounds can be produced which, in addition to the binary materials, also include ternary and even quaternary materials. 

Group V Elements Nitrogen Phosphorus Arsenic Antimony Bismuth... 

Thus, phosphorus, arsenic, antimony, bismuth, and zinc have unusual histories. By a strange caprice of nature, P, As, Sb, and Bi are in the main subgroup of the fifth group of the periodic table and the similarity in their properties often resulted in confusion. 

The R-M -X systems contain some elements of group V phosphorus, arsenic, antimony, bismuth and tantalum. 

Antimony [7440-36-0J, Sb, belongs to Group 15 (VA) of the periodic table which also includes the elements arsenic and bismuth. It is in the second long period of the table between tin and tellurium. Antimony, which may exhibit a valence of +5, +3, 0, or —3 (see Antimony compounds), is classified as a nonmetal or metalloid, although it has metallic characteristics in the trivalent state. There are two stable antimony isotopes that ate both abundant and have masses of 121 (57.25%) and 123 (42.75%). 

Arsenic, Antimony and Bismuth Table 13.4 Some physical properties of Group 15 elements... 

---