The Absolute Best Science Experiment for 499-40-1

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Related Products 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

Do metal-metal multiply-bonded “ligands” have a trans influence? Structural and magnetic comparisons of heterometallic Cr=Cr…Co and Mo=Mo…Co interactions

Reported here are two new compounds containing either a Cr=Cr…Co [1, CrCrCo(dpa)4Cl2, dpa = 2,2?-dipyridylamide] or a Mo=Mo…Co [2, MoMoCo(dpa)4Cl2] framework both having a multiply-bonded unit (Cr=Cr in 1, Mo=Mo in 2) in close proximity to the Co2+ ion and trans to a Co-Cl bond. Variable temperature magnetic susceptibility measurements reveal 1 to have a temperature-dependent spin equilibrium between a low-spin (S = 1/2) and high-spin (S = 3/2) state, whereas the Co2+ ion in 2 exists solely in its high-spin state. The crystal structures of 1 and 2 were determined. Variable temperature crystallographic data of 1 at 100 K and at room temperature reveal that the spin-transition affects not only the Co-ligand bond lengths but also the terminal Cr-ligand bond lengths. Whereas the Cr…Co distance becomes shorter by 0.13 A in the low-spin form, the Co-Cl distance becomes longer by 0.2 A. These observations, along with the crystal structure of 2, suggest that the multiply-bonded M=M group has a trans influence on the Co2+ ion. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.

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