2009
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Abstract: The relevance of cis and trans influences of some anionic ligands X and Y in cis-[PtX(2)(PPh(3))(2)] and cis-[PtXY(PPh(3))(2)] complexes have been studied by the X-ray crystal structures of several derivatives (X(2) = (AcO)(2) (3), (NO(3))(2) (5), Br(2) (7), I(2) (11); and XY = Cl(AcO) (2), Cl(NO(3)) (4), and Cl(NO(2)) (13)), density functional theory (DFT) calculations, and one bond Pt-P coupling constants, (1)J(PtP). The latter have allowed an evaluation of the relative magnitude of both influences. It is co… Show more

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“…We have been able to discriminate the two influences, showing that the former, although of lower importance, is by no means irrelevant and must be taken into account when rationalising 1 J PtP as well as Pt-P bond distances. We could also justify the sequences of both influences in terms of Pt-P bonding and charge on Pt [14].…”
Section: Introductionmentioning
“…Thus X-ray derived M-L bond lengths may be affected by crystal packing and conformational effects and only few M-L bond stretches can be unambiguously assigned (M-H, certain M-Cl and few others); CO stretching frequencies have also been used [13]. NMR investigations are usually based on the values of one bond coupling constants, which can be considered an estimate of the M-L bond strength [1,[13][14][15][16][17][18][19], but this technique can be used only when both M and the donor atom of L are NMR active ( 195 Pt-31 P, 103 Rh-31 P, etc.). 2 J MC and 3 J MH have also been employed [1,20].…”
Section: Introductionmentioning
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“…They compare well with the values found for the parent triphenyl phosphine complexes. [17][18][19][20][21][22][23] [17] and trans isomers. [16] The 1 H NMR spectrum of the [Zn 2 L(dppba)] + complex 6 ( Figure 2) displays a single signal set indicating the presence of just one isomer in solution.…”
Section: Synthesis and Characterization Of Precursor Complexes 4-6mentioning