1971
DOI: 10.1002/anie.197108011
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Allyldihydropentalenylene Complexes of Transition Metals

Abstract: that the modification of only one j 3 chain is not enough to block the interaction of the molecule as a whole with oxygen. Since this derivative also exhibits the myoglobin type of oxygen-binding curve, the interchain crosslinking, i. e. the fixation of the quaternary structure of the protein according to the model, can hinder the rearrangement from the deoxy form into the oxy form as effectively as the blockage of the terminal histidines of the p chains. The change in the quaternary structure, according to th… Show more

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Cited by 29 publications
(9 citation statements)
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“…Several examples of pentalenyl complexes of transition metals are known including some in which the pentalenyl group is bound to a trinuclear cluster. [59][60][61][62][63][64][65][66][67][68][69] Perhaps more interesting in the present context, though, are reports which describe discrete organometallic complexes which effect the conversion of various substituted cyclooctatetraenes to a bound pentalenyl ligand. [59][60][61][62][63] This, again, provides an excellent analogy supporting the reaction scheme proposed in this work.…”
Section: Discussionmentioning
confidence: 99%
“…Several examples of pentalenyl complexes of transition metals are known including some in which the pentalenyl group is bound to a trinuclear cluster. [59][60][61][62][63][64][65][66][67][68][69] Perhaps more interesting in the present context, though, are reports which describe discrete organometallic complexes which effect the conversion of various substituted cyclooctatetraenes to a bound pentalenyl ligand. [59][60][61][62][63] This, again, provides an excellent analogy supporting the reaction scheme proposed in this work.…”
Section: Discussionmentioning
confidence: 99%
“…The presence of bulky substituents appears to stabilize the pentalene system, as referred to earlier, and it seemed possible that pentalene complex formation might also be so favored. This work is at a preliminary stage, but the novel hydrocarbon 5,8-bis(trimethylsilyl)cycloocta-l,3,6-triene (18)42 reacts with 7 I SiMe, 1 SiMe, 18 (M -Si) or Ru3(CO)i2 to give a separable mixture of Me3Si-containing analogs of 16 and 17, and the bis(trimethylsilyl)pentalene complex Ru3(CO)8-[C8H,i(SiMe3)2] (19)43 in 10% yield, the structure of which has been established36 by X-ray diffraction. The molecular configuration (Figure 4) is nearly identical with that of Ru3(CO)8(C8He): Ru(l)-Ru(3) SiMe, Me,Si (0C)2Ru-Ru(CO), conformation is that in which the Me3Si group on C(l) is furthest from Ru(3).…”
Section: Reactions Of Cyclooctatrienesmentioning
confidence: 99%
“…Because of its relative unavailability, the chemistry of the pentalene dianion, C 8 H 6 2- (pent 2- ), has been studied far less than that of the other eight-membered aromatic dianion, C 8 H 8 2- , derived from cycloctatetraene. Transition metal complexes of pentalene have been reported, but in general these are η 5 complexes, with two metal atoms, each binding to a separate five-membered ring of the pentalene ligand in a trans conformation, e.g., [(η 3 -C 3 H 5 )Ni(η 5 ,η 5 -C 8 H 6 )Ni(η 3 -C 3 H 5 )] and [(η 5 -C 5 Me 5 )M(η 5 ,η 5 -C 8 H 6 )M(η 5 -C 5 Me 5 )] (M = Fe, Co, Ni) . Cis modes of bonding to two metals, where there is no direct bonding between the metals, have also been observed, e.g.…”
Section: Introductionmentioning
confidence: 99%