ISSN:
0009-2940
Keywords:
1,2-Diphosphaferrocene
;
Carbonylmetal complexes
;
Metallo-diphosphapropene
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Reaction of equimolar amounts of (η5-1,3-tBu2C5H3)(CO)-{3,4-(Me3SiO)2-5-(Me3Si)P2C3}Fe]2-FeP(SiMe3)2 with bis(trimethylsilyl)methylenechlorophosphane afforded the 1-metallo-1,2-diphosphapropene (η5-1,3-tBu2C5H3)(CO)2 FeP (SiMe3)P = C(SiMe3)2 (1b). Treatment of 1b with an excess of [(Z)-cyclooctene]Cr(CO)5 furnished 1,2-diphosphaferrocene (η5-1,3-tBu2C5H3)(η5-{1-[Cr(CO)5]-3,4-(Me3SiO)2-5-(Me3Si)P2C3}Fe (4b). Chromium complex 4b was freed from the pentacarbonylchromium fragment by heating with 1.5 equiv. of [Fe2(CO)9] in toluene solution at 80-90°C affording sandwich 5. In contrast, treatment of 4c with [Fe2(CO)9] in refluxing n-pentane yielded the trinuclear complex (η5-1,3-tBu2C5H3){η5-1,2-[Fe2(CO)7]-3,4-(Me3SiO)2-5-(Me3Si)P2C3}Fe (6). The ligation of sandwich 5 to the [Fe(CO)4] unit in 7 was achieved by irradiation with [Fe(CO)5] in n-pentane solution. A tricarbonylnickel adduct 8 resulted from the reaction of 4b with an excess of [Ni(CO)4] in toluene at ambient temperature. The molecular structures of the complexes 6 and 8 were established by single-crystal X-ray structure analyses. Cyclovoltammetric studies with 4b, 5, and 8 revealed an anodic shift of the oxidation potential when changing from 5 to 8 and 4.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19951280703
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