Sb-donor Ligands

and Sb-donor ligands. H N.m.r. measurements at 60, 100, and 220 MHz have been made for the complexes [PdCl2 Ph3 nP(CH2Ph)n 2] (n = 1, 2, or 3).82 The different spectra observed at these three frequencies have been explained in terms of hindered rotation about the P—C bonds when n = 2 and 3 and probably also for n = 1. The square-planar complexes [PdX2L] [L = cis-1,2-difluoro-1,2-bis(diphenylphosphino)ethylene X = Cl, Br, I, or SCN] have been obtained by treatment of [PdX4]2- with L.83 The complexes were characterized by chemical analysis and their visible spectra recorded. In addition, difluorophosphonato-complexes [M(PF20)4]2 (M = Pd or Pt) have been isolated as their JV-allyl-pyridinium salts (equation 16) and their n.m.r. and i.r. spectra reported.84 

Nelson and D. A. Redfield, Inorg. Nuclear Chem. Letters, 1973, 9, 807. 

Demura, T. Kawato, H. Kanatomi, and I. Murase, Bull. Chem. Soc. Japan, 1975,48, 2820 

THF is a convenient solvent for the preparation of Mn (the hardest 3d metal ion) complexes with Mc2AsCH2CH2EMe2 (E = As or Sb) (soft ligands) Spectroscopic properties suggest a trans octahedral geometry for the Mn(L-L)2X2 (X = Cl, Br, or 1) complexes, and e.s.r. evidence suggests that trace amounts of moisture readily decompose these complexes to MnX4  

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In most studies of Ni complexes with As or Sb donor ligands, the complete range of redox states is covered. Therefore, the reader should also refer to the examples given in the respective sections for Ni11 and Ni1. 

Following a preliminary account, details have appeared of the preparation of the complex [Pd(CO)(SnCl3)2Cl] . Also reported are the compounds (AsPhJ [Pd(CO)(ROH)2(SnCl3)2Cl] (R = Me or Et), and their substitution reactions with N, P, As, and Sb donor ligands. ... 

Table 23 Some Compounds Containing As or Sb Donor Ligands...

There are relatively few examples of cationic and anionic carbonyl halides containing monoden-tate P, As or Sb donor ligands. Reaction of [Ru(CO)3(PPh3)2] with I2 or Snl4 gives... 

Macrocycle complexes containing P, As or Sb donor ligands are covered in Section 45.12. 

Coit(C0)i2 is also known to undergo straightforward substitution reactions. The rate of the displacement of the first CO ligand is extremely rapid with P-, As-, and Sb-donor ligands and no kinetic data are available (see below). However, it has been shown that with P(0Me)3 at least one of the subsequent stages of reaction is bimolecular but that it leads to substitution and not fragmentation (67). 

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