TY - JOUR
T1 - Pt2 II and Pt2 III dimers containing a Pt2(2,2′-bipyridine)2(μ-N,N- dimethyl-guanidinato)2 unit
AU - Sakai, Ken
AU - Yokokawa, Kazuo
AU - Yokoyama, Yoshimi
PY - 2007/1/31
Y1 - 2007/1/31
N2 - The syntheses and crystal structures of the title Pt2 II and Pt2 III dimers doubly bridged with N,N-dimethyl-guanidinate ligands, namely bis-(μ-N,N-dimethyl-guanidinato)bis-[(2,2′-bipyridine) platinum(II)](Pt - Pt) bis-(hexa-fluoro-phosphate) acetonitrile disolvate, [Pt2 II(C3H8N3)2(C10H8N2)2](PF6)2·2CH3CN, (I), and guanidinium bis-(μ-N,N-dimethyl-guanidinato)bis-[(2,2′-bipyridine) sulfatoplatinum(III)](Pt - Pt) bis-(hexa-fluoro-phosphate) nitrate hexa-hydrate, (C3H10N3)[PtIII 2(C3H8N3)2(SO4)2(C10H8N2)2]NO3·6H2O, (II), are reported. The oxidation of the Pt2 II dimer into the Pt2 III dimer results in a marked shortening of the Pt - Pt distance from 2.8512 (6) to 2.5656 (4) Å. The change is mainly compensated for by the change in the dihedral angle between the two Pt coordination planes upon oxidation, from 21.9 (2) to 16.9 (3)°. We attribute the relatively strong one-dimensional stack of dimers achieved in the Pt2 II compound in part to the strong PtII⋯C(bpy) associations (bpy is 2,2′-bipyridine) in the crystal structure [Pt⋯C = 3.416 (10) and 3.361 (12) Å].
AB - The syntheses and crystal structures of the title Pt2 II and Pt2 III dimers doubly bridged with N,N-dimethyl-guanidinate ligands, namely bis-(μ-N,N-dimethyl-guanidinato)bis-[(2,2′-bipyridine) platinum(II)](Pt - Pt) bis-(hexa-fluoro-phosphate) acetonitrile disolvate, [Pt2 II(C3H8N3)2(C10H8N2)2](PF6)2·2CH3CN, (I), and guanidinium bis-(μ-N,N-dimethyl-guanidinato)bis-[(2,2′-bipyridine) sulfatoplatinum(III)](Pt - Pt) bis-(hexa-fluoro-phosphate) nitrate hexa-hydrate, (C3H10N3)[PtIII 2(C3H8N3)2(SO4)2(C10H8N2)2]NO3·6H2O, (II), are reported. The oxidation of the Pt2 II dimer into the Pt2 III dimer results in a marked shortening of the Pt - Pt distance from 2.8512 (6) to 2.5656 (4) Å. The change is mainly compensated for by the change in the dihedral angle between the two Pt coordination planes upon oxidation, from 21.9 (2) to 16.9 (3)°. We attribute the relatively strong one-dimensional stack of dimers achieved in the Pt2 II compound in part to the strong PtII⋯C(bpy) associations (bpy is 2,2′-bipyridine) in the crystal structure [Pt⋯C = 3.416 (10) and 3.361 (12) Å].
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U2 - 10.1107/S0108270106053601
DO - 10.1107/S0108270106053601
M3 - Article
C2 - 17284785
AN - SCOPUS:33846942233
VL - 63
JO - Acta Crystallographica Section C: Crystal Structure Communications
JF - Acta Crystallographica Section C: Crystal Structure Communications
SN - 0108-2701
IS - 2
ER -