Some indium(III)-substituted polyoxotungstates of the Keggin and Dawson types

Chirality in Polyoxometalate Chemistry

“…The same observations were reported by Pope for the organotin‐substituted derivatives [WM(SnR) 2 (B‐α‐MW 9 O 34 ) 2 ] 12– (M = Zn II or Co II , R = alkyl) 92. Kortz reported the structurally related indium(III)‐substituted tungstophosphates 93. Single crystals of [In 3 Cl 2 (B‐α‐PW 9 O 34 ) 2 ] 11– and [In 3 Cl 2 (B‐α‐P 2 W 15 O 56 ) 2 ] 17– were analyzed and, surprisingly, only three indium atoms are incorporated into the structure, leaving one vacant inner position in both structures (Figure 8b).…”

“…Zn = pink, V = yellow. b) Representations of [In 3 Cl 2 (B‐α‐PW 9 O 34 ) 2 ] 11– and [In 3 Cl 2 (B‐α‐P 2 W 15 O 56 ) 2 ] 17– 93. In = purple, Cl = orange.…”

Self-assembly of polyoxotungstate with tetrarhodium-oxo core: synthesis, structure and 183W NMR studies

“…According to molecular symmetry considerations, 183 W NMR spectra of 1 must consist of five signals in a 2 : 2 : 2 : 2 : 1 intensity ratio. 27 After the reaction was completed, five signals with the required intensity ratio were found at À87.0 (tt, J = 17 Hz), À119.8 (q, J = 17 Hz), À131.4 (t, J = 21 Hz) À147.7 (t, J = 21 Hz), and À158.1 (t, J = 17 Hz) ppm, in good agreement with the , which were identified from their reported chemical shifts. 28 Individual signal assignments were attempted taking into account the 2 J (W-W) coupling constants and assuming 2 J (Rh-W) { 2 J (W-W) (no 2 J (Rh-W) coupling was detected in the spectra of {PW 11 O 39 Rh} complexes), Fig.…”

Synthesis, Structure, and Characterization of In10-Containing Open-Wells–Dawson Polyoxometalate

“…Synthetic and structural studies of group 13 ion-containing POMs provide informative and definitive molecular models of group 13 metal clusters in solution. However, among all the Al-, Ga-, and In-containing POMs, formed by the substitution of several tungsten ions in the parent POMs with trivalent group 13 ions [28,[33][34][35][36][37][38][39][40], few well-characterized In-containing POMs have been reported to date [41][42][43]. Thus, In-containing POMs are intriguing target compounds from both a synthetic and a structural point of view.…”