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Challenging models of elastic collisions with a computer simulation (1993)
Journal Article
Whitelock, D., Taylor, J., O'Shea, T., Scanlon, E., Sellman, R., Clark, P., & O'Malley, C. (1993). Challenging models of elastic collisions with a computer simulation. Computers & Education, 20(1), 1-9. https://doi.org/10.1016/0360-1315%2893%2990065-q

A number of techniques were used to elicit 16–17 yr old physics students' understanding of collisions. The students appear to use two different models of reasoning, namely a linear causal and a resistance/reciprocal causal model. These models however... Read More about Challenging models of elastic collisions with a computer simulation.

IMINOAMINOSULFINATES - SYNTHESIS, CRYSTAL-STRUCTURES, AND REARRANGEMENT MONITORED BY LI-7 SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY (1993)
Journal Article
FREITAG, S., Kolodziejski, W., Pauer, F., & Stalke, D. (1993). IMINOAMINOSULFINATES - SYNTHESIS, CRYSTAL-STRUCTURES, AND REARRANGEMENT MONITORED BY LI-7 SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY. Dalton Transactions, 3479-3488. https://doi.org/10.1039/dt9930003479

Alkali- and alkaline-earth-metal iminoaminosulfinates have been synthesised and characterized by X-ray diffraction and solid-state NMR investigations. The viability of metal-exchange reactions has been demonstrated resulting in a magnesium and a copp... Read More about IMINOAMINOSULFINATES - SYNTHESIS, CRYSTAL-STRUCTURES, AND REARRANGEMENT MONITORED BY LI-7 SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY.

SYNTHESIS AND X-RAY CRYSTAL-STRUCTURE OF A STANNAIMINE (1993)
Journal Article
Ossig, G., Meller, A., FREITAG, S., & Herbstirmer, R. (1993). SYNTHESIS AND X-RAY CRYSTAL-STRUCTURE OF A STANNAIMINE. Journal of the Chemical Society. Chemical communications, 497-499. https://doi.org/10.1039/c39930000497

A stannaimine has been isolated for the first time; the tin atom is surrounded by three nitrogen atoms in a planar arrangement and the tin–nitrogen double bond is shortened by 10 pm compared with tin–nitrogen single bonds.