Why guanidine is strong base than urea?

Why guanidine is strong base than urea?

Oxygen is more electronegative than that of nitrogen, thus like to retain its lone pare better than nitrogen (cf. basicity of water and ammonia). Therefore, in that sense alone, guanidine is a better base than urea.

Why is guanidine unusually Basic?

(b) The remarkable basicity of guanidine is attributed to the fact that the positive charge on the guanidinium ion is delocalized by resonance over the three nitrogen atoms. This delocalization increases the stability of the guanidinium ion relative to the ammonium ion or substituted ammonium ions.

Why guanidine is more basic than aniline?

Guanidinium cation (II) is stabilished by the contribution of three exactly equivalent structures, whereas guanidine (I) has the resonating structures involving charge separation. Thus, the conjugate acid is more stable than the base and guanidine is, therefore, strong base.

Why is guanidine more basic than pyridine?

Guanidine [NH2​−NH∣∣​C​−NH2​​] is more basic than pyridine because conjugate acid of guanidine has three equal contributing resonating structure.

Is guanidine the strongest base?

Yes,guanidine is the strongest base than most of the amines. the increased basicity can be explained by drawing the resonance structure of the protonated guanidine.

Is guanidine a base?

Guanidinium cation With a pKb of 0.4, guanidine is a strong base. Most guanidine derivatives are in fact salts containing the conjugate acid.

What is the strongest base and why?

Just as acids can be stronger than the pH scale, so can bases. The title of strongest base in the world belongs to ortho-diethynylbenzene dianion. This superbase has the strongest proton affinity ever calculated (1843 kJ mol−1), beating out a long-standing contender known as lithium monoxide anion.

What is a strongest base?

A) Sodium hydroxide is the strongest base because it completely dissociates to form sodium ions and hydroxide ions.

Which is the most strongest base?

ortho-Diethynylbenzene dianion. ortho-Diethynylbenzene dianion is perhaps the strongest base known to us. It was initially synthesized/discovered by a group of researchers in Australia using mass spectrometry.

Which of these is the strongest base?

-Hence Benzyl amine is the strongest base among given compounds.