Lucas

Tidsweii i M, Lucas C A, Markovic N M and Ross P N 1995 Surface structure determination using anomaious x-ray scattering Underpotentiai deposition of copper on Pt(111) Phys. Rev. B 51 10 205-8... 

To 1 ml. of the alcohol in a small test-tube, add quickly 6 ml. of Lucas reagent at 26-27°, close the tube with a cork, shake, and allow to stand. Observe the mixture during 5 minutes. The following results may be obtained —... 

Lucas reageut is prepared by dissolving 68 g. (0-5 mole) of anhydrous zinc chloride (fused sticks, powder, etc.) in 62 6 g. (0 6 mole) of concentrated hydrochloric acid with cooling to avoid loss of hydrogen chloride. 

Carry out the Lucas test with iso-propyl alcohol, n-butyl alcohol, scc.-butyl alcohol, cycZohexanol and iert.-butyl alcohol. Obtain an unknown alcohol from the instructor for test. 

The reason for this is that reaction (i) is usually much slower than (ii) and (iii) so that the main reaction appears to be (Iv) (compare the preparation of tertiary butyl chloride from tertiary butyl alcohol and concentrated hydrochloric acid, Section 111,33). If the reaction is carried out in the presence of P3rridine, the latter combines with the hydrogen chloride as it is formed, thus preventing reactions (ii) and (iii), and a good yield of the ester is generally obtained. The differentiation between primary, secondary and tertiary alcohols with the aid of the Lucas reagent is described in Section III,27,(vii). 

B. H. Lucas, ed.. Proceedings of the International S olvent Extraction Conference, 1977, Vols. 1—2, Canadian Institute of Mining and Metallurgy, Montreal,... 

A. Lucas andj. R. H iAs, Ancient Egyptian Materials andindustries, 4th ed., E. Arnold, Loadoa, 1962. 

J. L. Woolfrey, Preparation and Caldnation of Ammonium Uranates—-A Eiterature Survey, AEC/TM-476, AustraUm Atomic Energy Commission, Lucas Heights, Austraha, Sept. 1968. 

J. M. Haschke, A. E. Hodges III, G. E. Bisby, and R. L. Lucas, Reaction ofPu with Water, REP-3416, Rockwell International, Golden, Colo., 1983. 

---