Tunable laser Stark-difference spectra of CD3OH

We present Doppler resolution limited spectra of the P(J) and R(J) multiplets for J ≦ 10 of the 10-μm CO stretch band of ¹²CD₃¹⁶OH using a tunable diode laser. Relative frequencies within the multiplets accurate to ±0.0002–0.0005 cm^?1 are obtained, but no absolute frequencies are given. We are able to assign most of the hindered rotation and K substructure in these multiplets. The assignments are based on analyses of Stark-difference spectra combined with the ground-state microwave data and the intensity variations which are expected theoretically. The ground and excited state A, K = 1 asymmetry splitting parameters are measured to be δ₁″ = (8.5450 ± 0.0080) × 10^?3cm^?1 and δ₁′ = (9.7706 ± 0.0080) × 10^?3cm^?1, respectively. The ground-state value agrees well with the microwave results. A rapid-scan system for recording data and a computer-aided technique for calibrating and plotting the spectra are described.     

Studies of methoxymethyl-directed metalation

To explore the use of methoxymethyl groups to elaborate simple benzenoid precursors to more complex polyketide-derived natural products, the reaction of phenolmetoxymethyl ether $\text{ortho}$-anion was investigated with a number of electrophiles.     

A symmetry-adapted method for the determination of the lattice energy and properties of ionic crystals

An efficient symmetry-adapted algorithm is described for the calculation of the elastic and dielectric properties of perfect ionic crystals.     

The stereochemistry of cyclisation of n-t-butyldihydrocinnamamide to a β-lactam

Using a stereospecifically labelled precursor, the peroxide catalysed cyclisation of N-$\text{t}$-butyldihydrocinnamamide to the corresponding β-lactam was shown to proceed with complete loss of stereochemistry at the benzylic carbon atom.