Molecular integrals of Breit interaction over Laguerre Gaussian-type functions

The Breit interaction consists of two interactions of the magnetic and the retardation terms. The molecular integrals involving the former interaction are shown to be reduced to the familiar integrals of the Coulomb repulsion. The integrals involving the latter interaction are formulated over the Laguerre Gaussian-type functions and some advantages of the formulation are discussed. Bayman's gradient formula of the solid spherical harmonic is generalized to include the gradient of the homogeneous solid spherical harmonic.     

Sequence analysis for an unknown peptide by molecular secondary ion mass spectrometry

Positive and negative molecular secondary ion as well as metastable ion mass spectra for various peptides are investigated to clarify their fragmentation regularity. The fragmentation regularity is derived by considering all the possible bond cleavages at the peptide bond or at the adjacent bonds. It is demonstrated that the amino acid sequence for an unknown peptide can be determined by interpreting the positive and negative secondary ion and metastable ion mass spectra using this fragmentation regularity.     

Photochemically induced coupling reaction of triarylstibines with olefins

Photoreaction of triarylstibines with styrenes resulted in the formation of 2-aryl-1-phenylethanols accompanied by air oxidation. Formation of the products has been explained by the valence expansion of the oxygen-antimony-styrene complex to a five-valent intermediate, followed by reductive coupling.     

A very crowded molecule: formation of bis(2,4,6-tri-t-butylphenyl)phosphinic chloride

Reaction of 2,4,6-ri-t-butylphenyllithium with phosphoryl trichloride gave a very crowded compound, bis(2,4,6-tri-t-butylphenyl)phosphinic chloride ($\text{1}$), and 2,4,6-tri-t-butylchlorobenzene ($\text{3}$), while the reaction with thiophosphoryl trichloride afforded $\text{3}$.     

Microwave spectrum of 15N16O2 in the ground state

¹⁵NO₂ (88 lines) in the ground state has been observed in the microwave spectral region up to 170 GHz. The least squares analysis gave the higher order distortion terms of rotational and spin-rotational Hamiltonian.     

Novel selective synthesis of α-chloromethyl, α,α-dichloromethyl,and α,α,α-trichloromethyl ketones from aldehyde utilizing electroreduction as key reactions

A variety of α-chloromethyl, α,α-dichloromethyl, and α,α,α-trichloromethyl ketones were synthesized from aldehyde utilizing cathodic reduction as key reactions.