Syntheses, Characterization, and X‐ray Crystal Structures of Mono‐Lacunary Dawson Polyoxometalate‐Based Organosilyl Complexes

Organic–inorganic hybrid material as zwitterion: Synthesis and structure of terminal ammonium ions-containing organosilyl species supported on mono-lacunary Dawson polyoxometalate

“…These 31 P chemical shifts were very similar to those of [a 2 [12]. In the 1 H and 13 C NMR spectra in CD 3 CN of 1, all organic chains and the countertions (Bu 4 N + ) were identified and assigned.…”

“…The bond lengths of Si-O (oxygen atom in the lacunary site) were in the range of 1.599-1.636 Å (average 1.612 Å ) [12], but they were much smaller than that of [a-A-PW 9 O 34 (tBuSiO) 3 (SiCH 2 CH@CH 2 )] 3À (173.7°) [22].…”

“…Recently, the molecular structures of Dawson POMbased organic-inorganic hybrid compounds such as [a 2 -P 2 W 17 O 61 {(RSi) 2 O}] 6À (Group A compounds with the terminal functional groups: R = HSC 3 H 6 , and NCSC 3 H 6 [12], and Group B compounds with the terminal olefins: R = {CH 2 @C(CH 3 )COO(CH 2 ) 3 } and {CH 2 @CHCOO-(CH 2 ) 3 } [13]) have been determined. The immobilization of some POM in Group A is attained by direct reaction of, e.g., the terminal HS-group with noble metal plates such as gold and platinum.…”

Polymerizable inorganic–organic hybrid: Syntheses and structures of mono-lacunary Dawson polyoxometalate-based olefin-containing organosilyl derivatives

“…Thus, this POM molecule lacking symmetry elements is represented as a C 1 symmetry compound in the solid state. On the other hand, the two organic chains in 2 were almost symmetrically orientated (C(2)-C(1)-Si (1) 6À with C s symmetry [19].…”

“…The bond valence sums (BVS) [22][23][24][25] of the 17 W atoms, calculated on the basis of the observed bond lengths, were in the range of 5.978-6.469 (average 6.158) for 1, and 5.838-6.438 (average 6.151) for 2; those of the two P atoms were 4 [19]. In the 1 H NMR spectra in D 2 O of 1 and 13 C NMR in DMSOd 6 of 2, all the organic chains and counterions ðMe 2 NH þ 2 Þ were identified and assigned (Table S3).…”