Stereochemistry and Crystal Structures of Palladium (Ⅱ) Complexes with cis- {meso(race)-1, 2-bis[alkyl(aryl)sulfinyl]ethane}

Abstract

Abstract: Six complexes of palladium (Ⅱ) with meso- and race-diastereoisomeric RS(O)CH₂CH₂-S(O)R(abbr.to meso-, race-BXSE.R = n-C₃H₇, C₆H₅, n-C₈H₁₇, X = Pr, P, O) were prepared.The crystal structures of PdCl₂-meso-BPrSE (I) and PdCl₂.race-BPrSE(Ⅱ) were determined.Crystal data: I : P2₁2₁2₁, a = 9.3650(9), b=9.747(2), c=19.341(5)Å, Z=4, R=0.044; Ⅱ: I_bca, a = 9.442(1), b=15.386(4), c = 20.095(3)Å, Z=8, R=0.030.The IRspectra indicate that the ligands are bonded to Palladium (Ⅱ) via sulfur atoms to form the cis-chelated complexes, which has been confirmed by the crystal Structures.△v_so[v_{so complex} -v_{so ligand}] for different Rgroups varies in the order: meso-BPrSE^- race-BPrSE>meso-BOSE^- race-BOSE> meso-BPSE^- race-BOSE.Ihas a C₁ symmetry and Ⅱ has C₂ symmetry.The four coordinated atoms around palladium (Ⅱ) form a right square plane for Ⅱ and a only slightly tetrahedrally distorted plane for I.It can be concluded that the higher melting point BPrSEis of meso form and the lower melting point BPrSEis of rac form.

Key words: Disulfoxide, Palladium complex, Crystal structure, Stereochemistry

TrendMD:

Shao Pinxi, Zhu Fuchun, Yang Yukun, Chen Ruisheng, Yao Xinkan, Wang Honggen, Wang Ruji. Stereochemistry and Crystal Structures of Palladium (Ⅱ) Complexes with cis- {meso(race)-1, 2-bis[alkyl(aryl)sulfinyl]ethane}[J]. Chem. J. Chinese Universities, 1989, 10(8): 821.

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