The kit contains 6 pre-weighted solid aliquots of Tri-Sodium phosphotungstate cluster at 3.5 mg each.
Tri-Sodium phosphotungstate contains 12 tungsten metal metal centres bridged by 24 oxygen atoms. In the center of the cluster there is a phosphorous heteroatom surrounded by 4 oxygen atoms, the remaining 12 oxygen atoms are forming W=O double bonds.
As a result, the cluster carries a negative charge of 3-.
Phosphotungstate Cluster Kit ManualThe kit contains 6 pre-weighted solid aliquots of Hexa-Sodium metatungstate cluster at 3.5 mg each.
Hexa-Sodium metatungstate is composed of 12 tungsten metal centers, each coordinated octahedrally by six oxo O2-ligands. There are a total of 28 bridging oxygen atoms that link the 12 tungsten centres, the remaining 12 oxygen atoms are forming W=O double bonds. In the center of the cluster there is a “void” which contains two protons, H+.
As a result, the cluster carries a negative charge of 6-.
Metatungstate Cluster Kit ManualThe kit contains 6 pre-weighted solid aliquots of Deca-Ammonium paratungstate cluster at 3.5 mg each.
Deca-Ammonium paratungstate is composed of 12 tungsten metal centers, each coordinated octahedrally by six oxo O2-ligands. There are a total of 28 bridging oxygen atoms that link the 12 tungsten centres, the remaining 14 oxygen atoms are forming W=O double bonds. In the center of the cluster there is a “void” which contains two protons, H+. As a result, the cluster carries a negative charge of 10-.
Paratungstate Cluster Kit ManualReferences
Rudenko et al. (2003) ‘MAD’ly phasing the extracellular domain of the LDL receptor: a medium-sized protein, large tungsten clusters and multiple non-isomorphous crystals. Acta Cryst. D59:1978.
Selected Literature Citations of JBS Tungsten Cluster Derivatization Kits
Dahms et al. (2013) Localization and orientation of heavy-atom cluster compounds in protein crystals using molecular replacement. Acta Cryst. D69:284.
