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Komplexierung von 1,3-Dihydro-1, 3, 10, 10-tetramethyl-1, 3-dibora-4, 5-benzopentafulven mit Fe(CO)3- und CpCo-Fragmenten: Synthese, Kristall- und Elektronenstruktur von Tricarbonyl[η5-cyclopentadienyl)cobalt] [μ,η5:η4-(1, 3-dihydro-1, 3, 10, 10-tetramethyl-1, 3-dibora-4, 5-benzopentafulven)]eisen (1991)

Nagy-Magos, Zsuzsanna ; Feßenbecker, Achim ; Pritzkow, Hans ; [et al.]

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2685-2689

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ISSN: 0009-2940

Keywords: Cobalt, (η5-cyclopentadienyl)(1, 3-dibora-4, 5-benzopentafulvene)- ; Iron tricarbonyl complexes ; Triple decker, mixed-metal, slipped ; Calculations, ab initio, EH ; Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Complexation of 1, 3-Dihydro-1, 3, 10, 10-tetramethyl-1, 3-dibora-4, 5-benzopentafulvene with Fe(CO)3 and CpCo Fragments: Synthesis, Crystal and Electronic Structure of Tricarbonyl[(η5-cyclopentadienyl)cobalt][μ,η5:η4-(1, 3-dihydro-1, 3, 10, 10-tetramethyl-1, 3-dibora-4, 5-benzopentafulvene)]ironReaction of the 1, 3-dibora-4, 5-benzopentafulvene 1 with the isolobal organometallic fragments Co(C5H5) and Fe(CO)3 leads to the slipped triple-decker complex 5. It is also formed when 2 is stacked with the Co(C5H5) fragment. The X-ray structure analysis of 5 reveals that the Co(C5H5) fragment is coordinated to the 1, 3-diborole ring, and the Fe(CO)3 group interacts with the Y-shaped B2C=C unit. An MO calculation indicates that the formation of 5 occurs by distortion of 2 (η5- → η4-bonding) and complexation of the Co(C5H5) group. 5 is 16 kcal/mol more stable than its structural isomer 6.

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/cber.19911241208

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Komplexierung von 1,3-Dihydro-1,3-diborapentafulven-Derivaten mit Fe(CO)3-Fragmenten: Synthesen, Kristall- und Elektronenstruktur von μ-(η4:η5-1,3-Dihydro-1,3-diborapentafulven)-bis (tricarbonyleisen)-Komplexen (1991)

Feßenbecker, Achim ; Enders, Markus ; Pritzkow, Hans ; [et al.]

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1505-1509

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ISSN: 0009-2940

Keywords: 1,3-Diborapentafulvene ; Iron tricarbonyl complexes ; Slipped triple-decker ; Calculations, ab initio, EH ; Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Complexation of 1,3-Dihydro-1,3-diborapentafulvene Derivatives with Fe(CO)3 Fragments: Syntheses, Crystal and Electronic Structure of μ-(η4: η5-1,3-Dihydro-1,3-diborapentafulvene)-bis(tricarbonyliron) ComplexesReactions of the 1,3-diborapentafulvene derivatives 1a-c with (CO)3Fe(C8H14)2 lead to the violet dinuclear complexes 3a-c, which possess a slipped triple-decker structure. The X-ray structure analyses of 3b,c reveal that one Fe(CO)3 group is pentahapto-coordinated to the 1,3-diborole frame of C2B2C=C, whereas the other interacts with the Y-shaped B2C=C unit. The latter resembles the interaction of Fe(CO)3 with trimethylenemethane. An MO calculation indicates that the formation of 3 occurs by distortion of 1 · Fe(CO)3; the slippage of Fe(CO)3 from η5 to η4 bonding is followed by η5 coordination of the second Fe(CO)3 group.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/cber.19911240704

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Synthese, Reaktivität und Komplexeigenschaften von nido-2,3,5-TricarbahexaboranenHerrn Professor Hans Bock zum 65. Geburtstag gewidmet. (1993)

Feßenbecker, Achim ; Hergel, Achim ; Hettrich, Ralph ; [et al.]

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 2205-2210

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ISSN: 0009-2940

Keywords: 1,3-Dihydro-1,3-diborafulvenes ; 4,5-Dimethylidene-1,3-diborolanes ; Hydroboration ; nido-2,3,5-Tricarbahexaboranes ; Metal complexes ; Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Syntheses, Reactivity and Complexation Properties of nido-2,3,5-TricarbahexaboranesBy double hydroboration of 1,3-dihydro-1,3-diborafulvenes 2 or 4,5-diisopropylidene-1,3-diborolanes 3 with (Et2BH)2 and subsequent loss of triethylborane derivatives 1 of 2,3,5-tricarbahexaborane are formed under mild conditions. The stability of the nido-carboranes 1 depends on the substituents in the basal positions. After deprotonation, the tricarbahexaboranate ion (1 - H) - functions as a cyclopentadienyl analogue (C5H5) - , and its reaction with allylnickel bromide dimer gives the allylnickel complexes 8a, b. Reaction of octacarbonyl dicobalt with 1b yields the dicarbonylcobalt complex 10b. Treatment of 1e with [(C5H5)Ni(CO)]2 results in the formation of the di-nuclear carbonyl-bridged complex 12e.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/cber.19931261007

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