Transition-metal derivatives of polyphosphazenes: syntheses of polyphosphazenes and cyclic model compounds with iron cyclopentadienyl carbonyl side groups

Generation of structural diversity in polyphosphazenes

“…Replacement of the halogen atoms by alkoxides, aryloxides or amines then yields mixed‐substituent polymers (Fig. ) In general, the more halogen atoms in the trimer or tetramer, the more facile the polymerization, probably due to the mechanistic value of chloride ionization from phosphorus as the initiation step for polymerization.…”

2-(2,6-Di-tert-butylphenoxy)-2',4,4,4',4',6,6,6',6'-nonachloro-2,2'-bi(cyclotri-λ5-phosphazene)

“…During the last two decades, the structure and properties of halophosphazenes have prompted an interest in the synthesis of new small-molecule organocyclophosphazenes and new inorganic backbone macromolecules (Allcock, Mang, McDonnel & Parvez, 1987). The organophosphazene derivatives are used in polymer synthesis and the resulting polymers are expected to have unique physical properties (Allcock, 1972;Allcock et al, 1987).…”

“…The organophosphazene derivatives are used in polymer synthesis and the resulting polymers are expected to have unique physical properties (Allcock, 1972;Allcock et al, 1987). Polyphos-phazenes with aryloxy, alkoxy and metallocenyl side groups are of special interest Alicock et al, 1987;Allcock, Manners, Mang & Parvez, 1990).…”

Synthesis of Main‐Chain Metal Carbonyl Organometallic Macromolecules (MCMCOMs)

“…For example, the cyclopentadienyl dicarbonyl iron group was attached to the side chains of homopolymers, e.g. poly(4‐vinyl chloride styrene), poly(dichlorophosphazene) and poly[p‐(chloromethysilylene)phenylene] via salt elimination reaction. Hydrosilylation reaction between (η 5 ‐C 5 H 5 )Fe(CO) 2 Si(CH 3 )CH = CH 2 and Si–H functionalized poly(methylhydrosiloxane)‐ b ‐poly(dimethylsiloxane) block copolymer in the presence of Karstedt catalyst has been explored affording silyl carbonyl iron‐functionalized copolymer .…”