Showing papers by "Milan Melnik published in 2013"
TL;DR: In this paper, the synthesis and spectral characterization of four new complexes [Cu2(5-Me-2-tpc)4(N-Menia)2] (1), [Cu(5Me2Tpc)2(N)-Menia (2)2·H2O (3), [cu2(2-Tpc)-4N-menia(2)4N)-n (n)n (4), and [cu(3-Me 2Tpc]-n (2.5Tpc]n (3-
15 citations
TL;DR: In this article, the trans-effect plays an important role in the inner coordination spheres about the Pt centers, especially on the Pt-L bond distances, covalent radii of the coordinated atom/ligand, and metallocycles.
Abstract: Abstract Four hundred and twenty monomeric organoplatinum compounds, in which platinum atoms are five- and higher coordinated, are analyzed. The platinum atoms are found in the oxidation states +2, +3 and +4. The Pt(II) compounds by far prevail. There are wide varieties of the inner coordination spheres about the platinum centers. The Pt(II) compounds are five-coordinated (trigonal bipyramidal and square pyramidal), six-coordinated (different degrees of distortion), seven-coordinated (pentagonal bipyramidal, piano stool) and sandwiched (PtC10). The Pt(III) compound is square-planar. The Pt(IV) compounds are six- and eight-coordinated. There are several relationships between the Pt-L bond distances, covalent radii of the coordinated atom/ligand, and metallocycles, which are discussed. The trans-effect plays an important role in the inner coordination spheres about the Pt centers, especially on the Pt-L bond distances.
4 citations
TL;DR: In this article, a review of heterooligo and heteropolynuclear Pt complexes with non-transition metals as partners is presented, and the mean Pt-Pt bond length is 2.770 Å.
Abstract: Abstract This review classifies and analyzes heterooligo- and heteropolynuclear Pt complexes in the presence of non-transition metals as partners. There is a wide variability of metal combinations: Pt6M, Pt2M5, Pt3Hg2Ru2; Pt6M2, Pt4Zn4, Pt2Hg6, PtHgAu6, PtHg2Au5; Pt6Hg4, Pt3HgRu6, PtHgAu8; Pt2Sn9, PtHg2Au8; Pt8Ge4, Pt8Sn4 and {PtM}n. The complexes crystallized in the following crystal classes: trigonal, orthorhombic (each 1 example)
2 citations
TL;DR: There are over 30 heterotetranuclear complexes of the types Pt3M (10 examples), Pt2M2 (15 examples, PtSn3 (5 examples), P2NaAg, P2Fe (2 examples) and PtSnHgGe (1 example) for which structural parameters are available as mentioned in this paper.
Abstract: Abstract There are over 30 heterotetranuclear complexes of the types Pt3M (10 examples), Pt2M2 (15 examples), PtSn3 (5 examples), Pt2NaAg, PtSn2Fe (2 examples) and PtSnHgGe (1 example) (M=non-transition metal) for which structural parameters are available. These were analyzed and classified. The inner coordination sphere about the Pt atom ranges from three to seven, with the most common one being square planar, whereas three (Y-shaped) and seven (4+3) are rarities. The M atoms are three- (Y-shaped; Li, Sn, Tl, Hg), four- (tetrahedral; Li, Ge, Sn, Hg), five- (mostly trigonal bipyramidal; Sn, Zn, Hg), and six-coordinate (pseudo-octahedral; Na, Sn, Tl, Cd). The mean Pt-M bond distance increased in the order 2.435 Å (M=Ge)<2.645 Å (Sn)<2.676 Å (Zn)<2.822 Å (Hg)<2.827 Å (Li)<2.833 Å (Pb)<2.898 Å (Tl)<2.960 Å (Cd). The data are compared and discussed with those found in heterodimers and heterotrimers.
2 citations