Lucas, Howard

Lucas, Howard J., and Archibald Y. Jameson. "Electron Displacement versus Alternate Polarity in Aliphatic Compounds." JACS 46 (1924) 24752482. 

Lucas, Howard J., T. P. Simpson, and J. M. Carter. "Electron Displacement in Carbon Compounds. III. Polarity Differences in C-H Unions." JACS 47 (1925) 14621469. 

In contrast, Lowry, Howard J. Lucas, and Arndt all were pressing forward with the hypothesis of inner ionic charges in conjugated compounds. Arndt... 

Saul Winstein, handwritten 3-page obituary notice for Howard J. Lucas, H. J. Lucas Papers, Caltech Pauling, speaking about Lucas, in interview with John Heilbron, 2d of 2 sessions, 12, SHQP, Berkeley. Also, see Saltzmann, "Development of Physical Organic Chemistry," 592. 

Also in the 1930s, detailed studies about the thermodynamic stability of adducts of silver(I) with olefins were carried out by Howard Lucas and coworkers, who determined the equilibrium constants between the hydrated Ag+ ion and the corresponding cationic olefin silver(I) complex in dilute aqueous solutions of silver nitrate [25]. In the context of this work, Saul Winstein and Lucas made an initial attempt to describe the interaction between Ag+ and an olefin by quantum mechanics [26]. Assisted by Linus Pauling, they explained the existence of olefin silver(I) compounds in terms of resonance stabilization between the mesomeric forms shown in Fig. 7.4. Following this idea, Kenneth Pitzer proposed a side-on coordination of Ag+ to the olefin in 1945 and explained the stability of the corresponding 1 1 adducts as due to an argentated double bond , in analogy to his concept of the protonated double bond [27]. He postulated that the unoccupied s-orbital of silver(l) allowed the formation of a bond with the olefin, similar to the s-orbital of the proton. 

Howard J. Lucas, California Institute of Technology, Pasadena 4, Calif. 

LHPM a Computer Program for Rietveld Analysis of X ray and Neutron Powder Diffraction Patterns, B. A. Hunter and C. J. Howard (February 2000), Lucas Heights Research Laboratories, Australian Nuclear Science and Technology Organisation and Rietica A visual Rietveld program, Brett Hunter, Int. Union Crystallogr., Commission Powder Diffr. Newsletter, 1998, No. 20, p. 21... 

Ca8 Carrington, A., Fabris, A.R., Howard, B.J., Lucas, N.J.D. Magnetic Resonance. New York ... 

Howard CJ, Hunter BA. A computer program for Rietveld analysis of X-ray and neutron powder diffraction patterns, Lucas Heights Research Lab, Australia, 1997. 

Howard, C.J., Luca, V., and Knight, K.S. High-temperature phase transitions in tungsten trioxide — the last word J. Phys. Condens. Matter 2002,14, 377-387. 

---