⁹Be and ³¹P NMR analyses on the influence of imino groups on Be²⁺ complex stabilities of a series of cyclo-μ-imido triphosphate anions

9Be nuclear magnetic resonance spectroscopy trends in discrete complexes: an update

9Be solution NMR spectroscopy is a useful tool for the characterisation of beryllium complexes. An updated comprehensive table of the 9Be NMR chemical shifts of beryllium complexes in solution is presented. The recent additions span a greater range of chemical shifts than those previously reported, and more overlap is observed between the chemical shift regions of four-coordinate complexes and those with lower coordination numbers. Four-coordinate beryllium species have smaller ω 1/2 values than the two- and three-coordinate species due to their higher order symmetry. In contrast to previous studies, no clear relationship is observed between chemical shift and the size and number of chelate rings.

Quantitative NMR of quadrupolar nucleus as a novel analytical method: hydrolysis behaviour analysis of aluminum ion

In this study, quantitative nuclear magnetic resonance (qNMR) spectroscopy of quadrupolar nuclei has been established.

Synthesis, protonation equilibrium and peculiar thermal decomposition behavior of cyclo-tri-μ-imidotetraphosphate

The synthesis and isolation of the sodium salt ofcyclo-tri-μ-imidotetraphosphate,i.e.Na₄cP₄O₉(NH)₃·H₂O, were achieved by the hydrolysis of Na₄cP₄O₈(NH)₄·2H₂O under very weak acidic conditions,i.e.using 0.2 mol L⁻¹propionic acid and the pH-controlled recrystallization procedure.