Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 21436-03-3, Name is (1S,2S)-Cyclohexane-1,2-diamine, Safety of (1S,2S)-Cyclohexane-1,2-diamine.
New antimonato polyoxovanadates based on the [V14 IVSb8IIIO42(H2O)] 4- cluster type
Two new antimonato polyoxovanadates with compositions (enH 2)2[V14Sb8O42(H 2O)]3H2O (1) (en = ethylenediamine) and (ppzH 2)2[V14Sb8O42(H 2O)] (2) (ppz = piperazine) were synthesized under solvothermal conditions. Compound 1 crystallizes in the monoclinic space group P2 1/n with a = 13.6969(8) , b = 11.9183(10) , c = 19.0413(12) , beta = 108.346(7), V = 2950.4(4) 3 and compound 2 crystallizes in the monoclinic space group P21/c with lattice parameters a = 13.7114(10) , b = 11.9476(5) , c = 19.9391(14) , beta = 109.043(8), V = 3087.6(3) 3. The central structural motif of both structures can be derived from the {V18O42} archetype cluster replacing four VO 5 square pyramids by four Sb2O5 moieties yielding two perpendicular oriented eight-membered rings composed of edge-sharing VO5 polyhedra. According to bond valence sum calculations the electronic situation in the clusters may be formulated as [VIV14SbIII8O42(H 2O)]4-. In compound 1 the cluster anions are arranged along the b-axis in a ?ABAB? fashion, whereas the anions in 2 are stacked along the c-axis in a ?AAA? mode. In both compounds neighbored clusters exhibit relatively short Sb-O separations indicating weak inter-cluster interactions, leading to a layer-like arrangement of the [V IV14SbIII8O42(H 2O)]4- anions. In the structure of 1 the charge balancing organic ammonium ions are fully disordered whereas the organic cations in 2 are ordered. Further characterization of compound 1 and 2 revealed that the initially used N,N,N?,N?-tetramethylethylenediamine was decomposed to ethylenediamine in 1 and the applied amine 1-methylpiperazine was fragmented to piperazine in 2. Syntheses with the latter amine led to crystallization of compound 1. But compound 2 could not be prepared applying piperazine in the reaction slurry.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Safety of (1S,2S)-Cyclohexane-1,2-diamine. In my other articles, you can also check out more blogs about 21436-03-3
Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare