195Pt, 119Sn and 31P NMR studies of alkyl, aryl and acyl trichlorostannate complexes of platinum(II). The crystal structure of trans-[Pt(SnCl3)(COC6H5)(PEt3)2]

Stannaborate Transition Metal Chemistry: Ligand Properties, Reactivity, and Density Functional Theory Calculations of Platinum and Palladium Complexes

“…The PtÀP bond length of trans coordinated PEt 3 ligands lies within the range of values known from the literature: for example, the trans-[(Et 3 P) 2 Pt-(COC 6 H 5 )SnCl 3 ] has PtÀP bond lengths of 2.324(4) and 2.329 (4) . [17] The SnÀPt bond length of 2.590(1) can be compared with the SnÀPt bond lengths in trans-[(Ph 3 P) 2 PtPh(SnB 11 H 11 )] À (2.651(1) ), [10] trans-[(Ph 3 P) 2 PtH-(SnCl 3 )] (2.601(4) ) [18] and trans-[(Et 3 P) 2 Pt(COC 6 H 5 )SnCl 3 ] (2.634(1) ). [17] The PtÀC and CÀN bond lengths of 1.913(10) and 1.195(12) , respectively, are typical for isocyanide coordination at Pt II which indicate weak p donation from the metal to the ligand.…”

“…[17] The SnÀPt bond length of 2.590(1) can be compared with the SnÀPt bond lengths in trans-[(Ph 3 P) 2 PtPh(SnB 11 H 11 )] À (2.651(1) ), [10] trans-[(Ph 3 P) 2 PtH-(SnCl 3 )] (2.601(4) ) [18] and trans-[(Et 3 P) 2 Pt(COC 6 H 5 )SnCl 3 ] (2.634(1) ). [17] The PtÀC and CÀN bond lengths of 1.913(10) and 1.195(12) , respectively, are typical for isocyanide coordination at Pt II which indicate weak p donation from the metal to the ligand. (Comparable complexes include: cis-[(MeNC) 2 PtMe 2 ]: PtÀC 1.979(8), NÀC 1.157(9) ; [19] cis-[(PhNC) 2 PtCl 2 ]: PtÀC 1.880(18), 1.912(22), NÀC 1.19(2), 1.14(3) ) [20] Density functional theory (DFT) calculations of the dipole moment: The betaine 7 is inert towards moisture and only soluble in polar solvents like dichloromethane.…”

“…[5,31] The PtÀP bond length of the axially coordinated phosphane ligand is 2.337(2) , which is similar to PtÀP distance in the ylide 7 or in [(Et 3 P) 2 Pt-(C(O)C 6 H 5 )SnCl 3 ] (2.324(4), 2.329(4) ). [17] The clusters coordinate at the platinum center with a PtÀSn bond length of 2.640(1) which is in the range of other PtÀSnB 11 H 11 complexes [10] and which is close to PtÀSn bond length in [Pt(SnCl 3 ) 5 ] 3À (2.551(1) ± 2.572 (1) ). [31] The isocyanide coordinates to the transition metal and exhibits PtÀC and CÀN bond lengths of 1.995(12) and 1.18(2) , respectively.…”

Tin, palladium and platinum derivatives of 1,1′-bis(diphenylphosphine)ferrocene. Crystal and molecular structures of 1,1′- bis-(diphenylphosphine)ferrocenedichloropalladium(II) and of 1,1′-bis(diphenylphosphine)ferrocenedichloroplatinum(II)

“…The terminal ~(Sn--C1) vibrations occur at lower wave numbers than in the free acid, in accordance with previous results ~2'3). In complexes (8) and (9) new Sn--CI bands also appear, at lower wave numbers. These bands were assigned to the bridging Sn--C1 vibrations t4,5).…”

“…Preparation of complexes (8) and (9) Complexes (8) and (9) were obtained by the treatment of (4) and (5) with SnC12.2H20 in equimolar quantities in CH2CI2:MeOH (1:1). The products were recrystallized from THF:MeOH:PhMe (1:3:1) and dried in vacuo, yielding brown crystals (yield 65%) of (8) and orange crystals (yield 68%) of (9).…”