| Abstract
| - Reaction of 1,2-dimethylhydrazine with the platinum hydroxo complex [(dppp)Pt(μ-OH)]2(BF4)2 gives the bridging1,2-dimethylhydrazido(−2) product [(dppp)2Pt2(μ-η2:η2-MeNNMe)](BF4)21. Crystals of 1·CH2Cl2 from CH2Cl2/Et2O are monoclinic (C/2) with a = 19.690(1), b = 18.886(1), c = 17.170 (1) Å, and β = 92.111(1)°. Treatmentof [(dppp)Pt(μ-OH)]2(OTf)2 with 1,1-dimethylhydrazine gives [(dppp)2Pt2(μ−OH)(μ−NHNMe2)](OTf)22. Crystalsof 2·CH2Cl2 from CH2Cl2/Et2O are triclinic (P-1) with a = 12.910 (3), b = 13.927(3), c = 17.5872 (3) Å, α =87.121(3), β = 89.997(4), and γ = 84.728(3)°. Reaction of [(dppp)Pt(μ-OH)]2(OTf)2 with 1 equiv ofphenylhydrazine in CH2Cl2 gives [(dppp)2Pt2(μ-OH)(μ-NHNHPh)](OTf)23. Two equivalents of phenylhydrazinewith [(dppp)Pt(μ-OH)]2(X)2 gives [(dppp)Pt(μ-NHNHPh)]2(X)24 (X = BF4, OTf). Crystals of 3·ClCH2CH2Clfrom ClCH2CH2Cl/iPr2O are monoclinic (P21/n) with a = 20.990(2), b = 13.098(1), c = 25.773 (2) Å, and β =112.944(2)°. Crystals of 4(X = BF4)·ClCH2CH2Cl.2(tBuOMe) from ClCH2CH2Cl/tBuOMe are monoclinic (C2/m) with a = 30.508(1), b = 15.203(1), c = 19.049 (1) Å, and β = 118.505(2)°.
- Various hydrazines and [(dppp)Pt(μ-OH)]2(X)2 (X = OTf, BF4) give three different types of hydrazido products. Side-bonded bridging [(dppp)2Pt2(μ-η2:η2-MeNNMe)](BF4)2 is formed with 1,2-dimethylhydrazine, while the hydroxo hydrazido [(dppp)2Pt2(μ−OH)(μ−NHNMe2)](OTf)2 is formed with NH2NMe2. Both hydroxo hydrazido [(dppp)2Pt2(μ-OH)(μ-NHNHPh)](OTf)2 and dihydrazido [(dppp)Pt(μ-NHNHPh)]2(BF4)2 are obtained from 1 and 2 equiv of phenylhydrazine, respectively.
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