Assertion: metal's compound | /r/HasProperty | e.g. organoborane compounds
Facets:
Source sentences:
text: In addition to the traditional metals, lanthanides, actinides, and semimetals, elements such as boron, silicon, arsenic, and selenium are considered to form organometallic compounds, e.g. organoborane compounds such as triethylborane (Et 3 B).