Bis(dithiobiureto)MII, M = Pt, Pd

Abstract

Abstract. (S2C2NaH4)zM , M=Pd or Pt, are isomorphous with identical cell parameters within experimental accuracy: orthorhombic, Pbca; Z=4; a=8.804 (2), b= 12.170 (8), c= I0.463 (7) ,~; Qo=Qc=2.28 and 2.87 g cm -a, respectively. The important structural featttres are a non-planar isolated (S2CzNaH4)zM moiety with four-coordinate planar MS4 metal geometry and M-S distances of 2.29 ,~.

Axial-Site Modifications of Paddlewheel Diruthenium(II, II) Complexes Supported by Hydrogen Bonding

“…The Ru–Ru distance for 5 and 6 is 2.2835(11) and 2.2894(10) Å, respectively, and the average Ru–O eq (O eq = equatorial oxygen atoms) bond distance is 2.064 and 2.063 Å, respectively, consistent with the [Ru 2 II,II ] oxidation state . The average M–S distance is 2.2913 Å for 5 with M = Pd and 2.2926 Å for 6 with M = Pt, similar to those in the original [M II (dtb) 2 ] complexes (2.304 Å for M = Pd and 2.295 Å for M = Pt) . The [M II (dtb) 2 ] unit is not planar because of the presence of large bending and twisting at the bonds of C–S–M, albeit almost flat for the coordination plane around Pd and Pt (i.e., MS 4 plane).…”

“…The dithiobiuret Pd and Pt complexes, [M II (dtb) 2 ] (M = Pd, Pt), which have structural character similar to that of dapy, i.e., the presence of an imino nitrogen atom and two adjacent amine groups, are expected to act as bridgeable CDBBs, i.e., metalloligands . To the best of our knowledge, however, there is no example that exhibits such a bridging mode as M–dtb–M′ (M′ meaning other metal ions).…”

“…In this context, we obtained the frontier orbital energy of [M II (dtb) 2 ] by DFT calculation. A list of the energy levels of HOMO and LUMO for [Ru 2 ( o -FPhCO 2 ) 4 (THF) 2 ] and [M II (dtb) 2 ] with M = Pd and Pt reported previously is given in Table . The LUMO energies of the [M II (dtb) 2 ] unit are −2.190 and −1.781 eV for M = Pd and Pt, respectively, which are much higher than the HOMO energy at −4.184 eV calculated for [Ru 2 II,II ( o -FPhCO 2 )(THF) 2 ], proving the isolated feature of [Ru 2 II,II ( o -FPhCO 2 )] and [M II (dtb) 2 ] from a viewpoint of charge.…”

Tripotassium cis-dichloro(hydrogendisulfito)platinate(II) K3[Pt{(SO3)2H}Cl2]. A case of an extremely short hydrogen bond O...H...O

“…In addition some Pd-S bond lengths (2.24 to 2.34 A) in sulfitopalladium(II) compounds are known (Spinnler & Becka, 1967;Capparelli & Becka, 1969;Messer, Breitinger & Haegler, 1979, 1980) and values of the lower limit of this range compare well with the values found in this work. It has been pointed out (Girling & Amma, 1976) that Pd-S and Pt-S bond lengths in analogous palladium(II) and platinum(II) complexes are the same within experimental error (see also Bronger, G/inther, Huster & Spangenberg, 1976). The same is true for the metalligand bond lengths in other Pd or Pt compounds, e.g.…”

THIO-LIGANDS in MONOMERIC Pt(II) COMPLEXES – STRUCTURAL ASPECTS

“…In another three derivatives, [Pt(η 2 -ptt) 2 ] (+2cation) 51 (Fig.1) a pair of bidentate (S,S) ligands form two six-membered chelate rings. All three differ in the ring atoms involved, with the ring angle closing in the order 97.56 (4)º (SC 3 S) 51 > 92.7(7)º (SCNCS) 52 > 90.0(1)º (SPNPS) 53 . The mean Pt-S bond distance elongates in the same order, 2.335Å > 2.295Å > 2.280Å.…”