Question

Group 13 elements form complexes much more
readily than the s-block elements. How many of
the complexes are not possible with Aluminum
(I) Oxalate complex
(II) Acetyl acetone complex
(III) 8-hydroxyquinoline complex
(IV) LiBF
(V) LiAIHA
(VI) Acetylide complex​

Answer 1

Answer:

Comment on “Theoretical Insights into the Excited State Decays of a Donor–Acceptor Dyad: Is the Twisted and Rehybridized Intramolecular Charge-Transfer State Involved?”

B. Dereka, A. Rosspeintner, D. Svechkarev and E. Vauthey

Journal of Physical Chemistry B, 124 (2020), p10578-10581

DOI:10.1021/acs.jpcb.0c06526 | unige:145015 | Abstract | Article HTML | Article PDF

Naphthalenediimides with Cyclic Oligochalcogenides in Their Core

I. Shybeka, A. Aster, Y. Cheng, N. Sakai, A. Frontera, E. Vauthey and S. Matile

Chemistry - A European Journal, 26 (2020), p14059-14063

Hide abstract | DOI:10.1002/chem.202003550 | unige:144761 | Abstract | Article HTML | Article PDF | Supporting Info

Naphthalenediimides (NDIs) are privileged scaffolds par excellence, of use in functional systems from catalysts to ion channels, photosystems, sensors, ordered matter in all forms, tubes, knots, stacks, sheets, vesicles, and colored over the full visible range. Despite this extensively explored chemical space, there is still room to discover core-substituted NDIs with fundamentally new properties: NDIs with cyclic trisulfides (i.e., trisulfanes) in their core absåorb at 668?nm, emit at 801?nm, and contract into disulfides (i.e., dithietes) upon irradiation at <475?nm. Intramolecular 1,5-chalcogen bonds account for record redshifts with trisulfides, ring-tension mediated chalcogen-bond-mediated cleavage for blueshifts to 492?nm upon ring contraction. Cyclic oligochalcogenides (COCs) in the NDI core open faster than strained dithiolanes as in asparagusic acid and are much better retained on thiol exchange affinity columns. This makes COC-NDIs attractive not only within the existing multifunctionality, particularly artificial photosystems, but also for thiol-mediated cellular uptake.