4-Bromo-N,N′-bis­(4-methoxy­phen­yl)benzamidine

The title compound, C21H19BrN2O2, is an amidine containing electron-donating meth­oxy groups and a bulky Br atom on the benzene rings. The solid-state structure reveals a non-centrosymmetric mol­ecule, with an E configuration around the C=N double bond. The C—N bonds show distinct amine [1.3689 (19) Å] and imine [1.285 (2) Å] characteristics. In the crystal, symmetry-related mol­ecules are linked via a very weak N—H⋯N inter­action, and C—H⋯O and C—H⋯π inter­actions

8-(Diphenyl­phosphan­yl)quinoline

The title compound, C21H16NP, is a known P—N chelator and various crystal structures of its metal complexes have been reported. However, no crystallographic evidence of the free ligand has been given to date. The phenyl rings are almost orthogonal to one another [dihedral angle = 88.9 (1)°], and they are twisted from the mean plane of the quinoline by 80.5 (1) and 76.3 (1)°

N 1,N 2-Bis­(2,6-di­methyl­phen­yl)-N 1-hydroxyformamidine N,N′-bis­(2,6-dimethyl­phen­yl)-N-oxidoformamidinium dichloro­methane solvate

The title compound, 2C17H20N2O·CH2Cl2, was obtained by N-oxidation of the parent formamidine with m-chloro-peroxy­benzoic acid (m-CPBA). This is the first use of the above-mentioned synthetic route for the preparation of hydroxy­amidines. The title compound crystallizes as a cyclic dimer resulting from the presence of O—H⋯O and N—H⋯N hydrogen bonds

4-Bromo-N-phenyl­benzamidoxime

The title compound, C13H11BrN2O, a hydroxy­amidine derivative (an amidoxime), was obtained by addition of the corresponding imidoyl chloride to hydroxy­lamine. The benzene and phenyl rings are twisted from the mean plane of the hydroxy­amidine group by 34.4 (1) and 59.2 (1)°, respectively. In the crystal structure, inter­molecular O—H⋯N hydrogen bonds link pairs of mol­ecules, forming centrosymmetric dimers

Bis(2,2′-bipyridine)(5-isothio­cyanato-1,10-phenanthroline)ruthenium(II) bis­(hexa­fluoridophosphate) acetonitrile solvate

The title compound, [Ru(C10H8N2)2(C13H7N3S)](PF6)2·CH3CN, was synthesized by the reaction of thio­phosgene and bis­(2,2′-bipyridine)(1,10-phenanthrolin-5-amine)ruthenium(II) bis­(hexa­fluoridophosphate). The RuII atom adopts a slightly distorted octa­hedral RuN6 coordinaton formed by four N atoms of two bipyridine ligands and by two N atoms of the 1,10-phenantroline ligand. The isothio­cyanate group is almost linear, with an N—C—S angle of 174.4 (6)°. Two of the three hexa­fluoridophosphate counter-anions are located on inversion centres

Bis(2-phenyl-4,6-di-2-pyridyl-1,3,5-triazine-κ3 N 4,N 5,N 6)ruthenium(II) bis(hexa­fluoridophosphate)

The asymmetric unit of the title compound, [Ru(C19H13N5)2](PF6)2, consists of an RuII complex cation and two hexa­fluoridophosphate anions. The RuII atom is coordinated by three N atoms from the two outer pyridine and the central triazine rings of each of two tridentate ligands in a distorted octa­hedral environment. The ligands are approximately orthogonal to one another, with a dihedral angle of 88.34 (2)° between planes through the three six-membered rings of the two ligands. The pendant phenyl substituents are almost coplanar with the triazine rings to which they are bound, with dihedral angles of 5.41 (9) and 14.90 (10)°. This is reflected in the previously reported photophysical results with an increased lifetime of the triplet metal to ligand charge transfer (3MLCT) excited state [Fang, Taylor, Hanan, Loiseau, Passalacqua, Campagna, Nierengarten & Van Dorsselaer (2002). J. Am. Chem. Soc. 124, 7912–7913]

5-Phenyl-2-(4-pyrid­yl)pyrimidine

The title compound, C15H11N3, crystallizes with two independent mol­ecules in the asymmetric unit. The dihedral angles between the phenyl and pyridine rings in each mol­ecule are 53.48 (5) and 50.80 (5)°. In the crystal structure, weak inter­molecular C—H⋯N hydrogen bonds connect mol­ecules into one-dimensional chains. In addition, the crystal structure is stabilized by weak C—H⋯π(arene) inter­actions

[4′-(2-Bromo-5-pyrid­yl)-2,2′:6′,2′′-terpyridine-κ3 N,N′,N′′]bis(triphenyl­phosphine-κP)­copper(I) tetra­fluorido­borate dichloro­methane hemisolvate

In the title complex, [Cu(C20H13BrN4)(C18H15P)2]BF4·0.5CH2Cl2, the copper(I) cation adopts a distorted tetra­hedral arrangement, coordinated by two triphenyl­phosphine ligands and two N atoms of the potentially tridentate terpyridine ligand. One half-mol­ecule of dichloro­methane crystallizes with the complex. The chlorine atoms are disordered over two sites with occupancies fixed at 0.30 and 0.20 respectively. The N donor atom of the central pyridine inter­acts weakly with the copper centre at a distance of 3.071 Å

[2,6-Bis(5-chloro­pyrimidin-2-yl-κN)pyri­dine-κN](2,2′:6′,2′′-terpyridine-κ3 N,N′,N′′)ruthenium(II) bis­(hexa­fluoridophosphate) acetonitrile disolvate

In the title compound, [Ru(C13H7Cl2N5)(C15H11N3)](PF6)2·2CH3CN, the RuII atom is coordinated in a distorted octa­hedral geometry by a tridentate 2,2′:6′,2′′-terpyridine ligand and a tridentate 2,6-bis­(5-chloro­pyrimidin-2-yl)pyridine ligand. Least-squares mean-plane distortions of only 1.72 (2) and 2.91 (2)° of the pyrimidyl rings with respect to the central pyridine are observed for the bis­(pyrimid­yl)pyridine-based tridentate ligand, while the distal pyridyl rings of terpyridine twist by 13.43 (7) and 4.68 (9)° away from the central pyridine ring

Blue emissive cobalt(III) complexes and their use in the photocatalytic trifluoromethylation of polycyclic aromatic hydrocarbons

A.K.P and G.S.H thank Natural Sciences and Engineering Research Council of Canada. A.K.P thanks the Leverhulme Trust Early Career Fellowship (ECF-2017-326) and the University of St Andrews. The authors thank the Prof. & Mrs Purdie Bequests Scholarship and AstraZeneca support for C.L. EZ-C thanks the Engineering and Physical Sciences Research Council (EP/M02105X/1) and the University of St Andrews.The first examples of room temperature (r.t.) luminescent Co(III) complexes ( 1 and 2 ) are presented that exhibit intense ligand‐to‐metal and ligand‐to‐ligand charge transfer absorption in the low energy UV region (λabs ~ 360‐400 nm) and low‐negative quasi‐reversible reduction events (E1/2(red) = −0.58 V and −0.39 V vs. SCE for 1 and 2 , respectively). The blue emission of 1 and 2 at r.t. is due to the large bite angles and strong σ‐donation of the ligands, the combined effect of which helps to separate the emissive 3LMCT (triplet ligand‐to‐metal charge transfer) and the non‐emissive 3MC (triplet metal‐centered) states. 1 and 2 were found to be powerful photo‐oxidants (ECo(III)*/Co(II) = 2.26 V and 2.75 V vs. SCE of 1 and 2 , respectively) and were used as inexpensive photoredox catalysts for the regioselective mono(trifluoromethylation) of polycyclic aromatic hydrocarbons (PAHs) in good yields (~ 40‐58%).PostprintPeer reviewe