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Transition-Metal Complexes with Bidentate Ligands Spanning trans-Positions. I. The synthesis of 2,11-bis(diphenylphosphinomethyl)benzo[c]-phenanthrene, a ligand promoting the formation of square planar complexes

✍ Scribed by N. J. DeStefano; D. K. Johnson; R. M. Lane; L. M. Venanzi

Publisher
John Wiley and Sons
Year
1976
Tongue
German
Weight
648 KB
Volume
59
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The bidentate ligand 2,11‐bis(diphenylphosphinomethyl)benzo[c]phenanthrene (1) was synthesized from 2,11‐dimethyl‐benzo[c]phenanthrene (3) via the corresponding bromomethyl derivative 9. 3 was obtained from the cyclization with boron trifluoride etherate of 1,1‐di‐(p‐methylphenethyl)‐epoxyethane (7), which was prepared from 1,5‐di(p‐tolyl)‐pentan‐3‐one (6).

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The ligand 2,1 l-bis(diphenylphosphinomethyl)benzo[c]phenanthrene (1) has been used to prepare complexes of the type [PtL(l)] (L = C,H,, CH,=CH-CO,Me, PhC-CPh, MeC-CMe, MeO,CC=CCO,Me, (i-Pr)O,CC-CCO,(i-Pr), Ph,P and CO). It is shown that these complexes are less labile than the corresponding species

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Gradual decomposition occurs above the temperature stated. b, Recorded in CHCI, solution. ') Recorded in a nujol mull; shoulders at 2190 and 2100 are also observed. d, Recorded in a nulol mull.

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The structures of [RhCl(CO)(l)] and [PdC1,(1)], where 1 is the bidentate ligand (C6H5)2P . CH2 . ClsHlo . CH2 . P (C6H5),, have been determined from threedimensional X-ray counter data collected on single crystals of the C6H5. CN solvates. The two compounds are isomorphous and crystallize in the tri

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## Abstract The five‐coordinate mononuclear complexes [M(CO)~3~(**1**)] (M = Fe, Ru; (**1**) = 2,11‐bis(diphenylphosphinomethyl)benzo[c]phenanthrene) have been prepared and assigned trigonal bipyramidal structures with apical phosphorus atoms from IR. and NMR. data.

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✍ D. K. Johnson; P. S. Pregosin; L. M. Venanzi 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 German ⚖ 729 KB

Sunznzary. The preparation of monomcric complexes [MX(l)] is reported where 1LI. = Cu, Ag, Au; X = I, C1, 7 3 0 3 , BF4 and 1 = 2,ll-bis(diphenylphosphinomethyl)benzo[c]phenanthrene. The solution structure of the complexes is discussed on the basis of molecular weight, conductivity and NMR. measure