Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Diiodo(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12I2Pt, CAS is 12266-72-7, about Heteroleptic platinum(II) complexes of macrocyclic thioethers and halides: the crystal structures of [Pt(9S3)Cl2], [Pt(9S3)Br2], and [Pt(9S3)I2].Formula: C8H12I2Pt.
The synthesis, spectroscopic, and crystal structures of three heteroleptic thioether/halide Pt(II) complexes [Pt(9S3)X2] (9S3 = 1,4,7-trithiacyclononane, X = Cl-, Br-, I-) are presented. All three 9S3/dihalo complexes form very similar structures in which the Pt(II) center is surrounded by a cis arrangement of two halides and two S atoms from the 9S3 ligand. The third S from the 9S3 forms a long distance interaction with the Pt center resulting in an elongated square pyramidal structure with a S2X2+S1 coordination geometry. The distances between the Pt(II) center and axial S shorten with larger halide ions (Cl- = 3.260(3) Å > Br- = 3.243(2) Å > I- = 3.207(2) Å). These distances are consistent with the halides functioning as π donor ligands, and their Pt-S axial distances fall intermediate between Pt(II) thioether complexes involving π acceptor and σ donor ligands. The 195Pt NMR chem. shift values follow a similar trend with an increased shielding of the Pt ion with larger halide ions. The 9S3 ligand is fluxional in all of these complexes, producing a single carbon resonance in the 13C NMR spectra. Addnl., a related series of homoleptic crown thioether complexes were studied using 195Pt NMR, and there is a strong correlation between the chem. shift and complex structure. Homoleptic crown thioethers show the anticipated upfield chem. shifts with increasing number of coordinated sulfurs. Complexes containing four coordinated S donors have chem. shifts that fall at -4000 to -4800 ppm while a value near -5900 ppm is indicative of five coordinated sulfurs. However, for S4 crown thioether complexes, differences in the stereochem. orientation of lone pair electrons on the S donors can greatly influence the observed 195Pt NMR chem. shifts, often by several hundred ppm.
After consulting a lot of data, we found that this compound(12266-72-7)Formula: C8H12I2Pt can be used in many types of reactions. And in most cases, this compound has more advantages.
Reference:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics