Fine Chart

1 Heteroatom on 2 or more C Atoms:

	E 15; VII/4
	see also:
	X=O	VII/4; IV/4, 5 b; V/2 a
	X=S	VII/4; E 11
	X=Te	E 12 b
	X=N	VII/4; IV/1 c; IV/5 a, b; V/1 b; X/2; XII/1
	X=P	–; E 1, 2

See also:

General Chart

Arene-X Hetarene-X