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New bis(phosphines) derived from N,N '-substituted ethylenediamine derivatives. Synthesis and transition metal chemistry of X2PN(R)CH2CH2(R)NPX2 (R = CH2Ph or Ph, X = Ph; R = CH2Ph, X-2 = O2C6H4). The crystal and molecular structure of Ph2PN(CH2Ph)CH2CH2(CH2Ph)NPPh2 and cis-[{PtCl2Ph2PN(CH2Ph)CH2CH2(CH2Ph)NPPh2}]

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Title New bis(phosphines) derived from N,N '-substituted ethylenediamine derivatives. Synthesis and transition metal chemistry of X2PN(R)CH2CH2(R)NPX2 (R = CH2Ph or Ph, X = Ph; R = CH2Ph, X-2 = O2C6H4). The crystal and molecular structure of Ph2PN(CH2Ph)CH2CH2(CH2Ph)NPPh2 and cis-[{PtCl2Ph2PN(CH2Ph)CH2CH2(CH2Ph)NPPh2}]
 
Creator BALAKRISHNA, MS
ABHYANKAR, RM
MAGUE, JT
 
Subject cyclopentadienyl-osmium chemistry
coordination chemistry
reductive elimination
carbonyl derivatives
dinuclear complexes
antitumor-activity
bidentate ligands
ruthenium
bis(dimethylphosphino)methane
rhodium
 
Description The bis(phosphines) of the type X2PN(R)CH2CH2(R)NPX2 (R = Ph or CH2Ph, X = Ph; R - CH2Ph, X-2 = O2C6H4) with the ethylenediamine framework were prepared by reaction of X2PCl with the corresponding N,N'-substituted ethylenediamine derivatives. These ligands readily formed complexes with Group 6 metals and Ru-II, Ni-II, Pd-II and Pt-II. All complexes were characterised by elemental analysis, IF: and NMR spectroscopic methods of which P-31-{H-1} is most valuable. The structures of the bis(phosphine) ligand Ph2PN(CH2Ph)CH2CH2(CH2Ph)NPPh2 and its platinum(II) complex cis-[PtCl2{PPh2N(CH2Ph)CH2CH2(CH2Ph)NPPh2}] were determined by X-ray crystallography. The ligand crystallises in the extended conformation with both the nitrogen atoms nearly planar and the bond angles around them close to 120 degrees. The P-N distances are shorter than normally accepted P-N single bond lengths (ca. 1.77 Angstrom) suggesting some degree of P-N pi bonding. The seven-membered chelate ring in the platinum complex is non-planar but the metal atom is in a typical square planar environment with two phosphorus atoms and two chlorine atoms in a mutually cis disposition and the ethylenediamine bridge is folded with respect to the plane in an "open envelope" fashion.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2011-08-28T14:03:13Z
2011-12-26T12:58:04Z
2011-12-27T05:47:11Z
2011-08-28T14:03:13Z
2011-12-26T12:58:04Z
2011-12-27T05:47:11Z
1999
 
Type Article
 
Identifier JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, (9), 1407-1412
0300-9246
http://dx.doi.org/10.1039/a809488h
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11757
http://hdl.handle.net/10054/11757
 
Language en