Photoacoustic calorimetry was used to quantify the antiaromaticity of 1,3-cyclobutadiene (CBD)
by measuring the heat release accompanying its formation via photofragmentation of a …

Time-resolved photoacoustic calorimetry is a new experimental technique that measures
the dynamics of enthalpy changes on the time scale of nanoseconds to microseconds for …

Method B. The same substrate solution as described in method A was mixed with an immobilized
lipase (prepared by stirring 100 mg of the enzyme and 5 g of XAD-8 (from Sigma) in 5 …

MATERIALS AND METHODS Patient selection. Patients were selected from those referred
to the Section of Cardiology for coronary cineangiography because of periodic chest pain, …

Diazene 3 is a logical precursor to l, 6 and its synthesis is shown in Scheme I. The key step
in this sequence is the stereospecific photochemical addition7 of iV-methyltriazolinedione (…

The relative energies of singlet biradicaloid and of triplet and singlet biradical electronic
states for a series of benzannelated isobenzofulvenes and isobenzoheptafulvenes were …

Application of 13C NMR spectroscopy15 has also led to reso-lution of the question of whether
one or two inactivator molecules are bound per dehydrase dimer. 16 Thus, to the sample …

Pioneering theoretical work of Hückel, Longuet-Higgins, Ovchinnikov, and Borden and
Davidson, inter alia, has addressed the question of the applicability of Hund’s first rule to …

Understanding the energetic cost of twisting and other distortions of-bonds is fundamentally
interestingand provides important insight into doublebond stereoisomerization processes. …

Thermolysis or direct photolysis of 5, 6-dimethylene-2, 3-diazabicyclo [2.1. 1] hex-2-ene (2)
in fluid solution produces 2, 4-dimethylenebicyclo [1.1. 0] butane (3), whose* H NMR …