TY - JOUR
T1 - Preparation and Structural Characterization of a Novel Hexanuclear Complex of Platinum(II) with 2-Aminoethanethiolate
AU - Gibson, Dan
AU - Lippard, Stephen J.
PY - 1986/1
Y1 - 1986/1
N2 - (Ethylenediamine)dibromoplatinum(II) reacts with 2-aminoethanethiol (AETH) at pH 10.5 in water to form light yellow crystals of [Pt6(AET)8]Br4·6H2O. In the hexanuclear [Pt6(SCH2CH2NH2)8]4+cation, which is crystallographically required to be centrosymmetric, two of the platinum atoms have a cis-[Pt(AET)2] square-planar (PtN2S2) structure, while square-planar (PtNS3) geometry is achieved for the other four platinum atoms by coordination to a chelating AET ligand and two bridging sulfur atoms. The six platinum atoms do not form a regular polyhedron but rather are joined by doubly bridging thiolate sulfur atoms into three fused rings, a central Pt4S4 eight-membered ring and two outer Pt3S3 six-membered rings. All eight 2-aminoethanethiolate ligands are both chelating and bridging. The average Pt-S and Pt-N bond lengths are 2.30 (2) and 2.085 (10) Å, respectively. The compound crystallizes in the triclinic space group P1̅, with a = 12.231 (2) Å, b = 12.400 (2) Å, c = 9.212 (1) Å, α = 107.13 (1)°, β= 108.88 (1)°, γ = 105.67 (1)°, V = 1156 Å3, and Z = 1. The final R(F) value was 0.036 for 2448 observed reflections.
AB - (Ethylenediamine)dibromoplatinum(II) reacts with 2-aminoethanethiol (AETH) at pH 10.5 in water to form light yellow crystals of [Pt6(AET)8]Br4·6H2O. In the hexanuclear [Pt6(SCH2CH2NH2)8]4+cation, which is crystallographically required to be centrosymmetric, two of the platinum atoms have a cis-[Pt(AET)2] square-planar (PtN2S2) structure, while square-planar (PtNS3) geometry is achieved for the other four platinum atoms by coordination to a chelating AET ligand and two bridging sulfur atoms. The six platinum atoms do not form a regular polyhedron but rather are joined by doubly bridging thiolate sulfur atoms into three fused rings, a central Pt4S4 eight-membered ring and two outer Pt3S3 six-membered rings. All eight 2-aminoethanethiolate ligands are both chelating and bridging. The average Pt-S and Pt-N bond lengths are 2.30 (2) and 2.085 (10) Å, respectively. The compound crystallizes in the triclinic space group P1̅, with a = 12.231 (2) Å, b = 12.400 (2) Å, c = 9.212 (1) Å, α = 107.13 (1)°, β= 108.88 (1)°, γ = 105.67 (1)°, V = 1156 Å3, and Z = 1. The final R(F) value was 0.036 for 2448 observed reflections.
UR - http://www.scopus.com/inward/record.url?scp=0022577842&partnerID=8YFLogxK
U2 - 10.1021/ic00222a025
DO - 10.1021/ic00222a025
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AN - SCOPUS:0022577842
SN - 0020-1669
VL - 25
SP - 219
EP - 222
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 2
ER -