Platinum(III) acetate

The first molecular paddlewheel platinum(III) acetate complex Pt2(μ-OOCMe)4(O3SMe)2

“…In this work, as part of our studies of platinum(II-IV) carboxylates [11][12][13][14][15], we synthesized and structurally determined with singlecrystal X-ray diffraction the first molecular diplatinum(III) paddlewheel Pt 2 (μ-OCOCMe) 4 (O 3 SMe) 2 (1) complex.…”

“…Unlike this we followed the Stephenson et al classical procedure [16] using hexahydroxoplatinum(IV) K 2 [Pt(OH) 6 ] complex as a starting material, formic acid as a reducing agent and acetic acid as a solvent. Although this procedure is rather unhandy to prepare crystalline platinum(II) acetate, it allows producing non-crystalline dark-blue to brown non-crystalline materials, so-called acetate platinum blues [11,12] containing the metal atom in an intermediate oxidation state between (II) and (IV), depending on the amount of formic acid, temperature and reaction time. In this work, reaction conditions providing the preparation of non-crystalline (probably polymeric) platinum(III) acetate [Pt(OCOMe) 3 ] n and its transformation into the crystalline molecular complex Pt 2 (μ-OCOCMe) 4 (O 3 SMe) 2 (1) have been found.…”

Synthesis and structure of the first platinum(II) pivalato complexes

“…Among VIII Group metals, the chemistry of platinum(II) homoligand carboxylates is restricted to the poorly soluble acetato 7,8 and haloacetato complexes. 9,10 Although ligand exchange in Pt II acido complexes readily occurs, previous attempts produced alkylcarboxylato compounds as an oil or non-crystalline solid.…”

“…Another synthetic approach was based on the reaction of platinum acetate blue [Pt(OOCMe) ~2.5 ] n (see ref. 8) with pivalic acid in benzene. Both ligand substitution and redox transformations of the platinum blue occurred in this system to produce several highly soluble Pt II pivalato complexes, from which tetranuclear complex 2 was isolated in a crystalline form.…”

“…The Pt-O bond length (average 2.011 Å) is comparable with analogous bond lengths in platinum(II) carboxylato complexes. [7][8][9][10] The dihedral angles between the planes of pivalate ligands and square-planar four O atoms are 77.3, 65.8, 65.7 and † A typical experimental procedure was as follows: a slurry of PtCl 2 (400 mg, 1.50 mmol) and potassium pivalate (420 mg, 3.00 mmol) in 5 cm 3 of THF was stirred for 2 h and then stored without stirring for 3 days at room temperature. The crystals formed were separated from the mother liquor by decanting, washed with benzene and dried in air to afford 27 mg (20%) of 1 as light-brown needles, one of which (0.01×0.02×0.5 mm) was used for X-ray diffraction analysis.…”