Awesome and Easy Science Experiments about 499-40-1

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Reference of 499-40-1. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal

Influence of supramolecular bonding contacts on the spin crossover behaviour of iron(ii) complexes from 2,2?-dipyridylamino/s-triazine ligands

Reactions of the related ligands 2-(N,N-bis(2-pyridyl)amino)-4,6- bis(phenoxy)-(1,3,5)triazine (L1) and 2-(N,N-bis(2-pyridyl)amino)-4,6- bis(pentafluorophenoxy)-(1,3,5)triazine (L1F) with iron(ii) thiocyanate produced two spin-crossover coordination compounds with distinct cooperative behaviours. trans-[Fe(L1)2(NCS)2] ¡¤2CH2Cl2 (1) displays a very gradual transition centred at T = 233 K, characterized by a DeltaT80 (namely the temperature range within which 80% of the transition considered occurs) of 90 K, while that of fluorinated trans-[Fe(L1F)2(NCS) 2]¡¤2CH3CN (3) is significantly more abrupt (and centred at T = 238 K), with a DeltaT80 of 50 K, resulting from supramolecular contacts induced by the fluorinated phenol groups. The coordination compound equivalent to 1 with selenocyanate anions, namely trans-[Fe(L1)2(NCSe)2]¡¤4CH2Cl 2¡¤4CH3OH (2), also exhibits SCO properties centred at T = 238 K, but the transition is very gradual (DeltaT80 = 150 K). Light-induced excited spin-state trapping (LIESST) is effective although incomplete for 2 and 3, while it is complete with a TLIESST of 58 K for 1. The Royal Society of Chemistry 2013.

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Reference£º
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics