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O.T. Beachley, Jr.

Professor Emeritus
Office: 678 Natural Sciences Complex
Phone: (716) 645-4253
Fax: (716) 645-6963
E-mail: beachley@buffalo.edu

Education:

B.Sc., Franklin and Marshall College (1959)
Ph.D., Cornell University (1963)
NIH Postdoctoral Fellow, University of Durham, Durham, England (1963-64)

History and Overview of Interests:

Professor Beachley retired in 2002. Professor Beachley’s research focused on the chemistry of organometallic main-group compounds and materials. Research was directed toward the preparation and characterization of interesting but important new compounds for developing novel electronic materials. Professor Beachley was awarded the 1975 SUNY Chancellor’s Award for Excellence in Teaching.

Specializations:

Synthesis of novel main-group compounds which might be precursors for electronic materials

Research Summary:

The chemistry of organometallic main-group compounds and of materials were brought together in Dr. Beachley’s research program. Research activity was directed toward the preparation and characterization of interesting but important new compounds with the potential to make new electronic materials or to solve problems identified as being significant to the formation of useful materials such as semiconductors.

Research focused on the synthesis, characterization and reaction chemistry of compounds of group 13 elements in oxidation states other than the typical +3 and of compounds envisioned to be converted to reactive species in lower oxidation states. This work was designed to discover new routes to low oxidation state compounds, and to determine what are the chemical characteristics of ligands which stabilize low oxidation state group 13 compounds; what is it the molecular structure of the compound in the different states of matter including the solid and gas phases and in solution and what reactions might the compound undergo which might be useful for the preparation of materials at “low” temperatures. Examples of low oxidation state compounds which have been prepared by graduate students in Dr. Beachley’s laboratory include In(C5Me5), [Ga(CH2CMe3)] n and [Ga(CH2CMe2Ph)] n. The indium(I) compound In(C5Me5) reacts with P4 at 175 °C to form InP whereas the typical reaction to make InP requires ~650 °C. Similarly, the gallium(I) compound, [Ga(CH2CMe3)]n, reacts with NH3 at 460-480 °C to form GaN whereas related reactions of organogallium(III) compounds need ~1000 °C.

The reaction of In(C5Me5) with P4 to form InP at 175 °C prompted investigations of the chemistry of Et2Ga(C5H5), a compound which can be envisioned to form [Ga(C5H5)] and might be used to prepare GaP or GaAs at “low” temperatures. Characterization of Et2Ga(C5H5) uncovered a most unusual compound. Even though an X-ray structural study identified a polymer of Et2Ga(C5H5) simplest units, the compound does not exist as a single pure compound in either the liquid state or in benzene solution. Surprisingly, the pure compound can be reformed by recrystallization of a benzene solution.

Selected Publications:

  1. Monomeric Gallium(III) Compounds with Three Different Ligands. Crystal and Molecular Structures of GaMeCl(acac) and GaCl[N(SiMe3)2](acac), O. T. Beachley, Jr.*, J. R. Gardinier, M. R. Churchill, D. G. Churchill and K. M. Keil, Organometallics, 2002, 21, 946-951.
  2. Reactions of Neopentylindium(III) Derivatives with Isopropylphosphorus Compounds, O. T. Beachley, Jr.*, S.-H. L. Chao and M. R. Churchill, Organometallics, 2001, 20, 4896-4902.
  3. Chemistry of (Tetramethylcyclopentadienyl)gallium(III) Compounds, O. T. Beachley, Jr.*, Michael T. Mosscrop and M. R. Churchill, Organomet. Chem., 2001, 626, 59-67.
  4. Synthesis and Characterization of Monomeric Organogallium-Nitrogen Compounds, Et2GaNMe[C6H2(2,4,6-t-Bu)3], Me2GaNMe[C6H2(2,4,6-t-Bu)3], MeGa{NH[C6H2(2,4,6-t-Bu)3]}2 and Ga{NH[C6H2(2,4,6-t-Bu)3]}3, O. T. Beachley, Jr.*, D. B. Rosenblum and D. J. MacRae, Organometallics, 2001, 20, 945-949.
  5. Homoleptic and Heteroleptic Organogallium Compounds Containing Substituted Cyclopentadienyl Ligands: Ga(C5H4Me)3, Ga(C5H4SiMe3)3 and R2Ga(C5H4Me) (R = Me, Et), O. T. Beachley, Jr.* and M. T. Mosscrop, Organometallics, 2000, 19, 4550-4556.
  6. Gallium(II) Compounds Stabilized by Beta-Diketonate Ligands: Synthesis, Characterization and X-Ray Structural Studies of [GaCl(acac)]2 and [GaCl(tmhd)]2, O. T. Beachley, Jr.*, J. R. Gardinier and M. R. Churchill, Organometallics, 2000, 19, 4544-4549.
  7. Reaction of KIn(CH2CMe3)3H with Chlorodiphenylphosphine, O. T. Beachley, Jr.* and S.-H.L. Chao, Organometallics, 2000, 19, 2820-2822.