They may also be prepared by the reduction of primary nitro compounds with stannous chloride and concentrated hydrochloric acid; by the reduction of unsaturated nitro compounds with minium amalgam or zinc dust in the presence of dilute acetic acid' Bouveault, Comptes rendus, 1902, 134, p. 1145):R2C:[[Chno 2 -R 2 C: Ch Nhoh - R 2 Ch Ch: Noh]], and by the action of alkyl iodides on the sodium salt of nitro-hydroxylamine (A.
P. 411), the cycle of reactions probably being as follows: NO 2 [[Nhoh-Hno 2 +Hno]]; HNO-}-RI-CHI+RNO (CH3CH2NO-->CH 3 CH: N OH).
It crystallizes in prisms which melt at 39° C. A chloral hydroxylamine, CC1 3 [[Choh Nhoh]], melting at 98° C. is obtained by allowing a mixture of one molecular proportion of chloral hydrate with two molecular proportions of hydroxylamine hydrochloride and one of sodium carbonate to stand for some time in a desiccator.
Scholl, Ber., 1896, 29, p. 87), the reaction probably being: RR:C(NO 2)NO-)RR: C: ([[Nhoh) 2 -)Rr: C: Noh+Nh20h]].
By the direct action of hydroxylamine on a methyl alcohol solution of mesityl oxide in the presence of sodium methylate a hydr oxylamino - ketone, diacetone hydroxylamine, (CH 3) 2 C(Nhoh) CH20OCH3,is formed.
C [[Nhoh-> C No- -C]] N02.