𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On the nature of transformation reactions of unsaturated glycols on the nickel cathode

✍ Scribed by Elena Binkauskienė

Publisher
Wiley (John Wiley & Sons)
Year
1997
Tongue
English
Weight
286 KB
Volume
70
Category
Article
ISSN
0268-2575

No coin nor oath required. For personal study only.

✦ Synopsis

The catalytic nature of the process of cathodic hydrogenation of the unsaturated bond has been determined by evaluating radiometrically the inÑuence of addition of di †erent quantities of 63Ni to the supporting solution free from nickel ions on the unsaturated bond hydrogenation rate. The catalytic activity of a nickel cathode used to hydrogenate 2-butynediol-1,4 labelled by a 14C isotope is approximately four times higher in a nickel-plating electrolyte than that in an electrolyte free from nickel ions. Electrolysis conditions determine the extent of triple bond reduction, the quantity of unsaturated glycols in the coating and its physical and mechanical properties. When using the mixture of acetylenic and ethylenic glycols, a bright, highly plastic (to 6%) coating is deposited from the nickel-plating electrolyte. The intermediate ethylene may be quantitatively synthesised in the nickel-plating bath.

📜 SIMILAR VOLUMES

On the nature of the omega transformatio
On the nature of the omega transformation
✍ H.E Cook 📂 Article 📅 1973 🏛 Elsevier Science ⚖ 677 KB

NATURE OF THE OMEGA TRANSFORMATION\* K E. COOK? The symmetry change associated with the b.c.c. to omega transformation is examined using the Landau criterion for a second order reaction. The ordering parameter 11 is defined in terms of the transformation displacements such that the structure defined

On the Nature and the Motion of Arc Cath
On the Nature and the Motion of Arc Cathode Spots in UHV
✍ A. I. Bushik; B. Jüttner; H. Pursch 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 933 KB

Cathode spot types and spot motion of arcs in ultra high vacuum have been investigated with large area cathodes that consisted of two adjacent pieces of Mo and Cu. Arc currents were 20-60 A dc and 8-20 kApulse (duration about 1 ms). Two spot types occured with different velocities and surface erosio