3.12 Other Polynitrogen Parent Systems
Table 13 (continued)
,JVVV'
I
HN=N-C=N-NH2
(Formazanyl)
2(N")NH
II
H 2 N-C-NH 2
3(N')
1(N)
Guanidine c
o
II
H 2 N-C-NH 2
3(N') 2 1(N)
Urea
OH
I
HN=C-NH2
3
2
1
Isourea
(Carbamimidic acid)
o
0
II
II ~
H2N-C-NH-CH2-C-~
5
1
Hydantoyl
[N-(Aminocarbonyl)glycyll
o
II
~
H2N-C-NH-NH-~
4
3 2
1
Semicarbazido
[2-(Aminocarbonyl)hydrazino 1
,JVVV'
~-N=N-6=N-N=~
(1)
(3)
(5)
(Formazan-1,3-diyl-5-ylidene)
Guanidino
(Aminoiminomethyl)amino
o
II
~
H2N-C-NH-~
3
2
1
Ureido
[(Aminocarbonyl)amino 1
o
II
H 2 N-C-NH-CH2-C02H
5
4
3
2
1
Hydantoic acid
[N- (Aminocarbonyl)glycine 1
o
II
H 2 N-C-NH-NH2
4
3
2
1
Semicarbazide
(Hydrazinecarboxamide)
o
II
~
H2N-C-NH-N=~
Semicarbazono
(( Aminocarbonyl)hydrazono)
a Chalcogen analogues: thiourea, selenocarbazide, tellurocarbodiazone etc.
b Analogously: Triuret etc.
C Analogously: Biguanide, triguanide etc.
145