We observed a school of ocean sunWsh Mola mola at the surface in the western North PaciWc Ocean (40°46.8ЈN, 165°01.7ЈE) for about 90 min in July 2010. The school consisted of juvenile Wsh, approximately 40 cm in total length, which kept the same tight formation throughout the observation. Most Wsh were heavily infested around the base of their dorsal Wns with an ecto-parasite Pennella sp. The Wsh school appeared to actively follow Laysan albatrosses Phoebastria immutabilis that were sitting on the water nearby, and one of the birds was photographed as it picked a Pennella sp. from one of the Wsh and ate it. We hypothesize that this symbiotic cleaning behavior by the albatrosses may be a common feature of the biology of the ocean sunWsh.

A series of free‐base and phosphorus(V) complexes of tetrabenzoporphyrin (TBP) and some phosphorus(V) porphyrins containing four or eight phenyl groups on the periphery have been synthesized and characterized by X‐ray crystallography, electronic absorption, and magnetic circular dichroism (MCD) spectroscopy, together with quantum chemical calculations. All phosphorus TBP and meso‐tetraphenyl porphyrin complexes adapted ruffled conformations due to the small P(V) ion, although the Zn(II)TBPs containing eight phenyl (Φ) groups at the so‐called β and α positions showed planar and saddled structures in the solid state, due to, respectively, marginal or severe steric hindrance between the neighboring Φ groups. All P(V)TBPs showed the Soret and Q bands beyond 450 and 700 nm, respectively, which are some of the longest wavelengths exhibited by metallated TBPs reported to date. Of the eight Φ group‐substituted P(V)TBPs, those substituted at α positions always showed absorption bands at longer wavelengths than those at β positions, which was reproduced by calculated absorption spectra. The Soret band positions of meso‐tetraphenylated P(V) species without fused benzo‐groups (ca. 430–440 nm) were also some of the longest among metalloporphyrins of this type.

1,3-Dihydrothieno[3,4-a]- and 1,3,8,10-tetrahydrodithieno[3,4-a;3′4′-m]-HPHACs were prepared by the successive SNAr reactions of hexafluorobenzene with 1,3-dihydrothieno[3,4-c]pyrrole and 3,4-dihexylpyrrole followed by Scholl oxidation. Oxidation of 1,3-dihydrothieno-fused HPHACs with excess amounts of iodine at room temperature quantitatively gave the corresponding dication bis(triiodide)s. Further dehydrogenative oxidation of the dicationic species with iodine giving a thieno[3,4-a]HPHAC dication was achieved at a higher temperature by removing hydrogen iodide generated during the reaction. Neutral species of thieno[3,4-a]HPHAC could not be isolated.

Ab icyclo[2.2.2]octadiene(BCOD)-fused bis(dipyrromethane) derivative was reacted with methylal in the presence of trifluoroacetic acid followed by oxidation with chloranil to give ad oubly N-confused phlorin derivative,w hich did not undergo the retro-Diels-Alder reaction extruding an ethylenem olecule on heating. In contrast, a7 -tert-butoxybicyclo[2.2.1]heptadiene(7-BuOBCHD)-fused bis(dipyrromethane) yieldedb enzene-ring-fused doubly N-confused porphyrins by following similar reaction sequences.[a] Prof.Supporting information (Experimental details,N MR spectra, and X-ray analysis data) and the ORCID identification number(s)for the author(s) of this articlecan be foundu nder:https://doi.Figure 7. ACID plot (left) and NICS(0)v alues(right) of 2a''.Inthe ACID plot, diamagnetic ring current paths are emphasized by blue lines with arrows. Bold bondsint he right drawing highlight two 18p macrocyclic pathways (black and magenta vs. black and green).