Crystal structure of bis-cationic square planar platinum(II) complexes containing the tridentate chelate ligand 2,6,-bis(methylthiomethyl)pyridine and para-substituted pyridines

Tuning the Electronic Structures of Platinum(II) Complexes with a Cyclometalating Aryldiamine Ligand

“…These values are consistent with those observed for related complexes with a bulky tridentate ligand bonded to the platinum center, such as Pt((2,6-CH 2 PPh 2 ) 2 C 6 H 3 )(8-acetamidoquinolinato) + (87.3°) . For complexes with less sterically hindered tridentate ligands, such as 2,6-bis((methylthio)methyl)pyridine (SNS), the dihedral angle shows greater variability, ranging from 55.0 to 89.3°: Pt(SNS)(4-CNpy) 2+ , 63.0, 89.3°; Pt(SNS)(4-COOHpy) 2+ , 55.0°; Pt(SNS)(4-NH 2 -py) 2+ , 81.3°; Pt(SNS)(4-Clpy) 2+ , 61.7°; Pt(SNS)(4-CH 3 py) 2+ , 79.4° . Similar variation is observed for a series of Pt(phbpy)(L) + complexes (phbpyH = 6-phenyl-2,2‘-bipyridine), where L = pyridine (61.7°), 4-aminopyridine (88°), 2-aminopyridine (65.5°), and 2,6-diaminopyridine (68°) .…”

Tuning the Electronic Structures of Platinum(II) Complexes with a Cyclometalating Aryldiamine Ligand

“…These values are consistent with those observed for related complexes with a bulky tridentate ligand bonded to the platinum center, such as Pt((2,6-CH 2 PPh 2 ) 2 C 6 H 3 )(8-acetamidoquinolinato) + (87.3°) . For complexes with less sterically hindered tridentate ligands, such as 2,6-bis((methylthio)methyl)pyridine (SNS), the dihedral angle shows greater variability, ranging from 55.0 to 89.3°: Pt(SNS)(4-CNpy) 2+ , 63.0, 89.3°; Pt(SNS)(4-COOHpy) 2+ , 55.0°; Pt(SNS)(4-NH 2 -py) 2+ , 81.3°; Pt(SNS)(4-Clpy) 2+ , 61.7°; Pt(SNS)(4-CH 3 py) 2+ , 79.4° . Similar variation is observed for a series of Pt(phbpy)(L) + complexes (phbpyH = 6-phenyl-2,2‘-bipyridine), where L = pyridine (61.7°), 4-aminopyridine (88°), 2-aminopyridine (65.5°), and 2,6-diaminopyridine (68°) .…”

Platinum assisted cyclization of S-methyl 3-acyl-2-methyldithiocarbazates under mild conditions. Crystal structure of [Pt2(μ-SMe)(terpy)2][ClO4]3 †

“…This is in agreement with the structural data of similar complexes of Pt II with ter-or tetra-dentate ligands 7,15-18 and with data derived from a sample of 31 structures of platinum() complexes, containing at least two pyridine ligands, which show that the shortening of the Pt-N distance is always associated with a strained or very strained environment characterized by N(py)-Pt-X(cis) angles ≈ 80Њ, independently of the nature of the X atom. 15 The Pt-S Ϫ distances of 2.31 Å, on average, are in perfect agreement with those observed in the structures of similar (2,2Ј : 6Ј,2Љ-terpyridine)thiolatoplatinum() compounds 7 and other square planar platinum() complexes. [19][20][21] The planes defined by the and the four co-ordinated atoms, Pt1, N1, N2, N3, S1 and Pt2, N4, N5, N6 and S1, form an angle of 50.7(2)Њ.…”

THIO-LIGANDS in MONOMERIC Pt(II) COMPLEXES – STRUCTURAL ASPECTS

“…There are trans- 6,64,78,79,[90][91][92][93][94][95][96][97] and cis- [80][81][82][83][84][85][86][87][88][89][98][99][100] derivatives. The molecule of [Pt(η 3bmtmp)(p-NCpy)](ClO 4 ) 2 97 contains two crystallographically independent molecules within the same crystal, differing mostly by degree of distortion.…”

Tuning the Electronic Structures of Platinum(II) Complexes with a Cyclometalating Aryldiamine Ligand

“…These values are consistent with those observed for related complexes with a bulky tridentate ligand bonded to the platinum center, such as Pt((2,6-CH 2 PPh 2 ) 2 C 6 H 3 )(8-acetamidoquinolinato) + (87.3°) . For complexes with less sterically hindered tridentate ligands, such as 2,6-bis((methylthio)methyl)pyridine (SNS), the dihedral angle shows greater variability, ranging from 55.0 to 89.3°: Pt(SNS)(4-CNpy) 2+ , 63.0, 89.3°; Pt(SNS)(4-COOHpy) 2+ , 55.0°; Pt(SNS)(4-NH 2 -py) 2+ , 81.3°; Pt(SNS)(4-Clpy) 2+ , 61.7°; Pt(SNS)(4-CH 3 py) 2+ , 79.4° . Similar variation is observed for a series of Pt(phbpy)(L) + complexes (phbpyH = 6-phenyl-2,2‘-bipyridine), where L = pyridine (61.7°), 4-aminopyridine (88°), 2-aminopyridine (65.5°), and 2,6-diaminopyridine (68°) .…”

Platinum assisted cyclization of S-methyl 3-acyl-2-methyldithiocarbazates under mild conditions. Crystal structure of [Pt2(μ-SMe)(terpy)2][ClO4]3 †

“…This is in agreement with the structural data of similar complexes of Pt II with ter-or tetra-dentate ligands 7,15-18 and with data derived from a sample of 31 structures of platinum() complexes, containing at least two pyridine ligands, which show that the shortening of the Pt-N distance is always associated with a strained or very strained environment characterized by N(py)-Pt-X(cis) angles ≈ 80Њ, independently of the nature of the X atom. 15 The Pt-S Ϫ distances of 2.31 Å, on average, are in perfect agreement with those observed in the structures of similar (2,2Ј : 6Ј,2Љ-terpyridine)thiolatoplatinum() compounds 7 and other square planar platinum() complexes. [19][20][21] The planes defined by the and the four co-ordinated atoms, Pt1, N1, N2, N3, S1 and Pt2, N4, N5, N6 and S1, form an angle of 50.7(2)Њ.…”

THIO-LIGANDS in MONOMERIC Pt(II) COMPLEXES – STRUCTURAL ASPECTS

“…There are trans- 6,64,78,79,[90][91][92][93][94][95][96][97] and cis- [80][81][82][83][84][85][86][87][88][89][98][99][100] derivatives. The molecule of [Pt(η 3bmtmp)(p-NCpy)](ClO 4 ) 2 97 contains two crystallographically independent molecules within the same crystal, differing mostly by degree of distortion.…”

Tuning the Electronic Structures of Platinum(II) Complexes with a Cyclometalating Aryldiamine Ligand

“…These values are consistent with those observed for related complexes with a bulky tridentate ligand bonded to the platinum center, such as Pt((2,6-CH 2 PPh 2 ) 2 C 6 H 3 )(8-acetamidoquinolinato) + (87.3°) . For complexes with less sterically hindered tridentate ligands, such as 2,6-bis((methylthio)methyl)pyridine (SNS), the dihedral angle shows greater variability, ranging from 55.0 to 89.3°: Pt(SNS)(4-CNpy) 2+ , 63.0, 89.3°; Pt(SNS)(4-COOHpy) 2+ , 55.0°; Pt(SNS)(4-NH 2 -py) 2+ , 81.3°; Pt(SNS)(4-Clpy) 2+ , 61.7°; Pt(SNS)(4-CH 3 py) 2+ , 79.4° . Similar variation is observed for a series of Pt(phbpy)(L) + complexes (phbpyH = 6-phenyl-2,2‘-bipyridine), where L = pyridine (61.7°), 4-aminopyridine (88°), 2-aminopyridine (65.5°), and 2,6-diaminopyridine (68°) .…”

Platinum assisted cyclization of S-methyl 3-acyl-2-methyldithiocarbazates under mild conditions. Crystal structure of [Pt2(μ-SMe)(terpy)2][ClO4]3 †

“…This is in agreement with the structural data of similar complexes of Pt II with ter-or tetra-dentate ligands 7,15-18 and with data derived from a sample of 31 structures of platinum() complexes, containing at least two pyridine ligands, which show that the shortening of the Pt-N distance is always associated with a strained or very strained environment characterized by N(py)-Pt-X(cis) angles ≈ 80Њ, independently of the nature of the X atom. 15 The Pt-S Ϫ distances of 2.31 Å, on average, are in perfect agreement with those observed in the structures of similar (2,2Ј : 6Ј,2Љ-terpyridine)thiolatoplatinum() compounds 7 and other square planar platinum() complexes. [19][20][21] The planes defined by the and the four co-ordinated atoms, Pt1, N1, N2, N3, S1 and Pt2, N4, N5, N6 and S1, form an angle of 50.7(2)Њ.…”

THIO-LIGANDS in MONOMERIC Pt(II) COMPLEXES – STRUCTURAL ASPECTS

“…There are trans- 6,64,78,79,[90][91][92][93][94][95][96][97] and cis- [80][81][82][83][84][85][86][87][88][89][98][99][100] derivatives. The molecule of [Pt(η 3bmtmp)(p-NCpy)](ClO 4 ) 2 97 contains two crystallographically independent molecules within the same crystal, differing mostly by degree of distortion.…”