Syntheses, X-ray Structural Characterizations, and Thermal Stabilities of Two Nonclassical Trinuclear Vanadium(IV) Complexes, (V\\r <sub/>3sub>\\r (μ\\r <sub/>3sub>\\r -O)O\\r <sub/>2sub>\\r )(μ\\r <sub/>2sub>\\r -O\\r <sub/>2sub>\\r P(CH\\r <sub/>2sub>\\r C\\r <sub/>6sub>\\r H\\r <sub/>5sub>\\r )\\r <sub/>2sub>\\r )\\r <sub/>6sub>\\r (H\\r <sub/>2sub>\\r O) and (V\\r <sub/>3sub>\\r (μ\\r <sub/>3sub>\\r -O)O\\r <sub/>2sub>\\r )(μ\\r <sub/>2sub>\\r -O\\r <sub/>2sub>\\r P(CH\\r <sub/>2sub>\\r C\\r <sub/>6sub>\\r H\\r <sub/>5sub>\\r )\\r <sub/>2sub>\\r )\\r <sub/>6sub>\\r (py), and Polymeric Complexes of Stoichiometry (VO(O\\r <sub/>2sub>\\r PR\\r <sub/>2sub>\\r )\\r <sub/>2sub>\\r )\\r <sub/>∞sub>\\r , R\\r <sub/>2sub>\\r = Ph\\r <sub/>2sub>\\r and\\r o-\\r (CH\\r <sub/>2sub>\\r )\\r <sub/>2sub>\\r (C\\r <sub/>6sub>\\r H\\r <sub/>4sub>\\r )