Preparation and reaction of platinum(II) complexes of N,N-bis(dicyclohexylphosphinomethyl)aminomethane. Crystal structures of (Cy2PCH2)(2)NMe (Cy = cyclohexyl) and [PtX2{(Cy2PCH2)(2)NMe}], (X = Cl and I)

Serindag O., Kemmitt R., Fawcett J., Russell D.

TRANSITION METAL CHEMISTRY, vol.24, no.4, pp.486-491, 1999 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 4
  • Publication Date: 1999
  • Doi Number: 10.1023/a:1006916608831
  • Journal Name: TRANSITION METAL CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.486-491
  • Çukurova University Affiliated: Yes

Abstract

Treatment of [Cy2P(CH2OH)(2)]Cl with MeNH2 in the presence of Et3N affords a high yield of the phosphine (Cy2PCH2)(2)NMe (1) (dcpam) which has been characterised by a single crystal X-ray structure. Treatment of [PtX2(COD)], (COD=cyclo-octa-1,5-diene, X= Cl or I) with (1) affords the platinum complexes [PtX2{(Cy2PCH2)(2)NMe}] (2). The chloride complex, (2a), reacts with t-BuNC to afford [PtCl(t-BuNC)-{(Cy2PCH2)(2)NMe}]Cl (3) and treatment of (2a) with 2-mercapto-1-methylimidazole affords [Pt{SCN(Me)CHCH=N(Me)}{Cy2PCH2)(2)NMe}]Cl (5). The reaction of (2a) with 2-acetamidoacrylic acid in the presence of silver(I) oxide affords the carbon bonded isomer (8a) only whereas a similar reaction using [PtCl2{Ph2P-(CH2)(3)PPh2}] affords a mixture of the azaallyl complex (7) and the carbon bonded isomer (8b) which can be separated by fractional crystallisation. The crystal structures of PtX2{(Cy2PCH2)(2)NMe}] are also reported.