PdTeI and Pd₂SeI₃ ‐ The First Chalcogenide Halides of a Platinum Metal

Abstract

room temperature with insertion of the alkyne into the metalcarbene bond to give alkenyl(amin0)carbene complexes[2]. On warming a typical representative of this class of compounds, pentacarbonyl[diethylamino(cL-diethylamino-P-methoxystyryl)carbene]chromium ( I ) , in decane, a CO ligand cis to the carbene ligand is substituted intramolecularly by the amino function of the styryl substituent, leading to formation of the tetracarbonyl complex (2). Stronger heating of the solution results in the loss of further CO and attack of the carbene-carbon at the ortho position of the phenyl ring. Thus cyclization occurs to give the 2,3-bis(diethylamino)-l-methoxyindene, which remains coordinated as the tricarbonyl complex ( 3 )

Strong charge density wave fluctuation and sliding state in PdTeI with quasi-one-dimensional PdTe chains

“…Therefore, the magnetotransport behaviors of PdTeI at low temperatures originate from the combined effects of the suppression of CDW by magnetic field, the multiband effects and the one-dimensionalization of electronic structure. 14…”

“…High-quality single crystals of PdTeI were grown using hydrothermal method [13,14]. Pd powder, Te and I2 chunks were mixed together with the ratio of 1 : 1 : 2.…”

Dynamic charge disproportionation in the 1D chain material PdTeI

“…PdTeI was originally characterized using single crystal X-ray diffraction and assigned the P4 2 /mmc space group with lattice parameters of a ¼ 7.808(2) Å and c ¼ 5.660(1) Å. 12 This structure is intriguing given that, assuming oxidation states of 2-and 1for tellurium and iodine, as bond valence sums suggest, the formal oxidation state of Pd in this material is 3+. This is a highly unusual oxidation state for palladium, which instead tends to disproportionate into Pd 2+ and Pd 4+ .…”

Single-Crystal X-Ray Diffraction and Electronic Band Structure Studies of PdTeI

“…Given the local coordinate system shown in 5, the t g levels of a regular octahedral Pd¸ are described by the (1) xz, yz, and x!y orbitals of Pd, and the e g levels by the xy and z orbitals of Pd. In the distorted octahedron PdTe I of each Pd> (d) cation, the Pd-Te N bond is longer than the Pd-Te # bond, and the Pd-Te N bonds are tilted away from the z axis.…”

“…The synthesis and crystal structure of palladium telluride iodide, PdTeI, were briefly reported nearly two decades ago (1). This compound has an unusual oxidation state Pd> (d) and has a three-dimensional (3D) extended structure.…”