Semiconductor devices with shallow junctions can be fabricated using plasma immersion ion implantation. In this technique BF3 gas has been used as the boron dopant source due to its low toxicity. Not only are ions implanted but, because of the fluorine ions, there is etching and deposition at the wafer surface. Therefore, the relationship between total dose and processing time is not straightfo...

FKBP52 and β-catenin have emerged in recent years as attractive targets for prostate cancer treatment. β-catenin interacts directly with the androgen receptor (AR) and has been characterized as a co-activator of AR-mediated transcription. FKBP52 is a positive regulator of AR in cellular and whole animal models and is required for the development of androgen-dependent tissues. We previously char...

We have re-examined the B-N distance potential of CH3CN-BF3 using MP2, DFT, and high-accuracy multicoefficient methods (MCG3 and MC-QCISD). In addition, we have solved a 1-D Schrödinger equation for nuclear motion along the B-N stretching coordinate, thereby obtaining vibrational energy levels, wave functions, and vibrationally averaged B-N distances. For the gas-phase, MCG3//MP2/aug-cc-pVTZ po...

The nucleophilic addition of silyl-enol ethers to nitrogen in 3-monosubstituted s-tetrazines mediated by BF3 is reported. preference for this azaphilic over the usually observed inverse electron demand Diels–Alder reactions was evaluated theoretically and corroborated experiments. substrate dependency unusual reaction rationalized determination activation barriers on basis strain model employin...

Natural communities of marine bacteria, an isolate (FMB-Bf3) from one marine community, and Escherichia coli were examined by video microscopy for the magnitude and uniformity of their speed. Natural communities formed tight microswarms that showed higher speeds (mean = 230 microns s-1) than did E. coli (15 microns s-1) or FMB-Bf3 (mean = 62 microns s-1). Outside the microswarms, the marine bac...

Butadiene Produces a Hexameric Product. Subhasis De, Cynthia S. Day, and Mark E. Welker* Department of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, NC 27109 An unusual hexameric structure has been isolated from exposure of 3-BF3-1-Phenyl-1,3Butadiene to air and moisture in an attempt to obtain crystals of the starting compound. Formation of this hexamer is rationalized and i...

Abstract A method for the synthesis of functionalized piperidines containing 3 contiguous stereocentres in 2-,3- and 4- positions uses a diastereoselective nitro-Mannich to control stereochemistry. The reaction between β-aryl/heteroaryl substituted nitroalkanes glyoxylate imine provides β-nitro-amines with good selectivity (70:30 >95:5) syn, anti-diastereoisomers. Reductive cyclisation BF3.OEt2...