9.15 The (2-aminoethyl)phosphine ligand has the structure shown below; it often acts as a bidentate ligand toward transition metals. (See N. Komine, S. Tsutsuminai, M. Hirano, S. Komiya, J. Organomet. Chem., 2007, 692, 4486.) H₂N PH2 a. When this ligand forms monodentate complexes with palladium, it bonds through its phosphorus atom rather than its nitrogen. Suggest an explanation. b. How many possible isomers of dichlorobis [(2-amino- ethyl)phosphine]nickel(II), an octahedral coordination complex in which (2-aminoethyl)phosphine is biden- tate, are there? Sketch each isomer, and identify any pairs of enantiomers. c. Classify the configuration of chiral isomers as A or A.

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9.15 The (2-aminoethyl)phosphine ligand has the structure
shown below; it often acts as a bidentate ligand toward
transition metals. (See N. Komine, S. Tsutsuminai,
M. Hirano, S. Komiya, J. Organomet. Chem., 2007, 692,
4486.)
H₂N
PH2
a. When this ligand forms monodentate complexes with
palladium, it bonds through its phosphorus atom rather
than its nitrogen. Suggest an explanation.
b. How many possible isomers of dichlorobis [(2-amino-
ethyl)phosphine]nickel(II), an octahedral coordination
complex in which (2-aminoethyl)phosphine is biden-
tate, are there? Sketch each isomer, and identify any
pairs of enantiomers.
c. Classify the configuration of chiral isomers as A or A.
Transcribed Image Text:9.15 The (2-aminoethyl)phosphine ligand has the structure shown below; it often acts as a bidentate ligand toward transition metals. (See N. Komine, S. Tsutsuminai, M. Hirano, S. Komiya, J. Organomet. Chem., 2007, 692, 4486.) H₂N PH2 a. When this ligand forms monodentate complexes with palladium, it bonds through its phosphorus atom rather than its nitrogen. Suggest an explanation. b. How many possible isomers of dichlorobis [(2-amino- ethyl)phosphine]nickel(II), an octahedral coordination complex in which (2-aminoethyl)phosphine is biden- tate, are there? Sketch each isomer, and identify any pairs of enantiomers. c. Classify the configuration of chiral isomers as A or A.
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