250677-29-3Relevant academic research and scientific papers
Synthesis of palladium and platinum complexes containing the multidentate ligands PPh2CH2(tBu)=N-N=C(R)Q (R = H, Me; Q = 2-pyridine, 2-thiophene, o-BrC6H4). Crystal structure of [PtMe{PPh2CHC(tBu)NNCMe(2-py)-κ 3N,N′,P}] and [PdBr{PPh2CH2C(tBu)=N-N=CHC6
Lee, Chunghun,Kang, Youngjin,Kang, Sang Ook,Ko, Jaejung,Yoo, Jung Whan,Cho, Moon Hwan
, p. 165 - 175 (1999)
The reaction of PPh2CH2C(tBu)=NN=CMe(NC5H 4) (1) with [Pt2Me4(μ-SMe2)2] gave the six-membered metallacycle [PtMe2{PPh2CHC(tBu)NNCMe(2-py)-κ 2N,P}] (4) which was converted into [PtMe{PPh2CHC(tBu)NNCMe(2-py)-κ 3N,N′,P}] (5) at elevated temperature. Treatment of the methyl platinum complex 5 with an excess of MeI gave [PtMe2I{PPh2CHC-(tBu)NNCMe(2-py)-κ 3N,N′,P}]. A similar reaction of PtMe2(cod) with [PPh2CH2C(tBu)=NN=C(HSC4H 3] (2) also afforded PtMe2{PPh2CH2C(tBu)NNC(H)SC 4H3-κ2N,P} (7). The prolonged heating of 7 led to decomposition rather than the cycloplatination product. The treatment of 2 with PtCl2(cod) in the presence of NEt3 gave the deprotonated platinum(II) complex [Pt{PPh2CH=C(tBu)N-N=C(H)SC4H 3-κ2N,P}2] (8) containing an ene-hydrazone backbone. The cyclopalladated metallacycle [PdBr{PPh2CH2C(tBu)=N-N=CHC6H 4}-κ3C,N,P] (9) has been prepared by the oxidative addition of the o-halo-substituted phosphino hydrazone derived from PPh2CH2C(tBu)=N-N=C(H)(o-BrC6H 4) (3) to Pd2(dba)3. These new complexes have been characterized by 1H-, 13C-, and 31P-NMR, and elemental analyses. The molecular structures of 4, 5 and 9 have been determined by a single-crystal X-ray diffraction study.
