Abstract
In the structure of the title solvated complex, [Pt(C8H4N2S2)2(C5H6N2)2]·C2H6OS or trans-[Pt(4-ap)2(qdt)2]·dmso (4-ap = 4-amino-pyridyl, C5H6N2; qdt = quinoxaline-2,3-di-thiol-ate, C8H4N2S2; dmso = dimethyl sulfoxide, C2H6OS) the centrosymmetric complex exhibits Pt-S distances in agreement with other PtIV-S bond lengths found in platinum(IV) di-thiol-ene complexes. The qdt ligands have inter-molecular inter-actions with an amine hydrogen atom on a 4-ap ligand (hydrogen bonding) and have sandwich π-π inter-actions with a neighboring qdt ligand.
Highlights
The title trans-[Pt(4-ap)2(qdt)2] ((4-ap = 4-aminopyridyl; qdt = quinoxaline-2,3-dithiolate) complex is located about an inversion center and has the central PtIV atom in a pseudo-octahedral N2S4 coordination environment (Fig. 1)
The chelating qdt ligands of this platinum(IV) complex are slightly canted relative to the platinum-sulfur atoms, with a 15.59 (11) angle between the plane of all the non-H atoms of the qdt ligand versus the plane containing Pt, S1, S2, S1 (1 À x, 1 À y, Àz) and S2 (1 À x, 1 À y, Àz)
The basicity of the nitrogen atom on the coordinating qdt ligand (Cummings & Eisenberg, 1995b) makes it suitable for hydrogen bonding. This is observed between the amine hydrogen H4A and the N3 (x, y + 1, z) atom on a neighboring qdt ligand, with a distance of 2.23 A (Table 1, Fig. 2)
Summary
The title trans-[Pt(4-ap)2(qdt)2] ((4-ap = 4-aminopyridyl; qdt = quinoxaline-2,3-dithiolate) complex is located about an inversion center and has the central PtIV atom in a pseudo-octahedral N2S4 coordination environment (Fig. 1). In contrast to the shorter PtII—S distances in salts of [Pt(mnt)2]2– (mnt = maleonitriledithiolate), such as 2.295 (2) and 2.2958 (19) Awith the tetraphenylphosphine cation (Begum et al, 2014) or 2.290 (2) and 2.282 (2) Awith the tetrabutylammonium cation (Guntner et al, 1989), the PtIV—S distances of the title coordination compound are 2.3514 (11) A (Pt1—S1) and 2.3495 (11) A (Pt1—S2). The Pt1— N1 distance in the title complex is 2.063 (4) A , which is similar to the Pt—N distance of 2.055 (2) Ain the aforementioned trans-[Pt(NH3)2(mnt)2] complex (Siddiqui et al, 2020)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
