A transition-metal complex of benzyne

p-Xylene clathrate of tris(1,8-naphthalenedioxy)cyclotriphosphazene. X-ray crystal and molecular structure

“…However, the fact that the p-xylene molecule is restricted to one position indicates that the host-guest interactions are more significant than, for example, in II. 2 A second but unoccupied channel system exists at the origin between side groups at P(l) and P(5). The channel can be viewed along its axis if the unit cell is rotated around z approximately 40°counterclockwise from the larger channel axis.…”

“…In any case, the stability of this clathrate is much higher than that of II with benzene. 2 The high stability of the clathrate formed between III and p-xylene can be attributed to two causes.…”

Mechanisms for nucleophilic and photonucleophilic aromatic substitution reactions

“…Moreover, arynes have been observed in flash-photolysis experiments and in mass ~pectrometry,~~ and recently dehydrobenzene has been trapped as a stable complex whose probable structure is (1X) from the reaction of o-di-iodobenzene with tetracarbonylnickel in pentane at 70°. 45 In this complex the C(6) groups retain their aromatic character as evidenced by lH n.m.r. meas~rernents.~~ MO Calculations have been used to assign a structure with a triple bond, as in (VlIl), to b e n ~y n e .…”

Synthesis of monomeric niobium- and tantalum-benzyne complexes and the molecular structure of Ta(.eta.5-C5Me5)(C6H4)Me2

“…Some of these compounds have been shown to undergo pH dependent imidazolate bridge splitting reactions,3•4 of relevance to proposed enzyme mechanisms. 8 Additional solution studies would be greatly facilitated if the imidazolate bridged bimetallic center were incor-0002-7863/79/1 501-0265501.00/0 C 25 Figure 1. Structure of [Cu2(imH)2(im)cA]3+ showing the 40% probability thermal ellipsoids.…”