[(4-Bromo­phen­yl)(2-pyridyl­methyl­idene)amine-κ2 N,N′]bis­(1,1,1,5,5,5-hexa­fluoro­pentane-2,4-dionato-κ2 O,O′)cobalt(II)

In the title complex, [Co(C5HF6O2)2(C12H9BrN2)], the CoII atom exhibits a pseudo-octa­hedral coordination geometry, comprising two N-donor atoms from a bidentate chelate (4-bromo­phen­yl)(2-pyridyl­methyl­idene)amine (ppaBr) ligand [Co—N = 2.098 (2) and 2.209 (2) Å] and four O-donor atoms from two bidentate chelate 1,1,1,5,5,5-hexa­fluoro­pentane-2,4-dionate (hfac) ligands [Co—O range = 2.0452 (19)–2.0796 (19) Å]. The packing of the structure involves weak π–π inter­actions between the pyridyl and benzene rings of neighbouring ppaBr ligands [centroid–centroid distance = 3.928 (2) Å] and inter­actions between the Br atom on the ppaBr ligand and the hfac ligand [Br⋯C = 3.531 (2) Å]

Exposure of benthic invertebrates to sediment vibration: From laboratory experiments to outdoor simulated pile-driving

Activities directly interacting with the seabed, such as pile-driving, can produce vibrations that have the potential to impact benthic invertebrates within their vicinity. This stimuli may interfere with crucial behaviors such as foraging and predator avoidance, and the sensitivity to vibration is largely unknown. Here, the responsiveness of benthic invertebrates to sediment vibration is discussed in relation to laboratory and semi-field trials with two marine species: the mussel (Mytilus edulis) and hermit crab (Pagurus bernhardus). Sensory threshold curves were produced for both species in controlled laboratory conditions, followed by small-scale pile-driving exposures in the field. The merits of behavioral indicators are discussed, in addition to using physiological measures, as a method of determining reception and measuring responses. The measurement and sensors required for sediment vibration quantification are also discussed. Response and threshold data were related to measurements taken in the vicinity of anthropogenic sources, allowing a link between responsiveness and actual operations. The impact of pile-driving on sediment-dwelling invertebrates has received relatively little research, yet the data here suggest that such activities are likely to impact key coastal species which play important roles within the marine environment

(Di-2-pyridyl­amine-κ2 N,N′)[hydro­tris­(3,5-diphenyl­pyrazol-1-yl-κN 2)borato]nickel(II) bromide dichloro­methane monosolvate

In the title compound, [Ni(C45H34BN6)(C10H9N3)]Br·CH2Cl2, the NiII atom is five-coordinated by the tridentate hydro­tris­(3,5-diphenyl­pyrazol­yl)borate ligand and a bidentate di-2-pyridyl­amine ligand in a distorted square-pyramidal geometry. In the crystal, inter­molecular N—H⋯Br and C—H⋯Br hydrogen bonds link the Ni complex cations and the Br− ions, forming a chain along the c axis

Tris(phenanthroline-κ2 N,N′)cobalt(II) tetra­fluoridoborate acetonitrile solvate

In the crystal structure of the title compound, [Co(C12H8N2)3](BF4)2·CH3CN, the mol­ecular packing involves dimers of distorted octahedrally coordinated cations which are held together by one π–π [centroid–centroid = 3.542 (4) Å] and two C—H⋯π inter­actions [2.573 (4) Å] resulting in a P4AE (Parallel Fourfold Aryl Embrace) motif. The anions are found in aryl boxes formed from the phenanthroline ligands

[4-Bromo-N-(pyridin-2-yl­methyl­idene)aniline-κ2 N,N′]bis­(1,1,1,5,5,5-hexa­fluoro­pentane-2,4-dionato-κ2 O,O′)nickel(II)

The title compound, [Ni(C5HF6O2)2(C12H9BrN2)], the NiII atom exhibits a pseudo-octa­hedral coordination geometry. The structure packs through C—H⋯Br inter­actions, forming a hydrogen-bonded ladder. There are also strong hydrogen-bonding inter­actions between two of the O atoms of the β-diketonate ligands and two H atoms on the pyridine ring of the Schiff base ligand

What is meant by "quality" in milk?

Cover title.Includes bibliographical references

[Tris(3,5-diphenyl­pyrazol­yl)hydro­borato]nickel(II) bromide

In the title tris­(pyrazol­yl)borate (TpPh2) complex, [NiBr(C45H34BN6)], the Ni, Br and B atoms lie on a crystallographic threefold axis and a distorted NiN3Br tetra­hedral geometry arises for the metal ion. In the crystal, C—H⋯(C=C) and C—H⋯π inter­actions help to establish the polar crystal packing