نتایج جستجو برای: c20 cages complexes
تعداد نتایج: 144873 فیلتر نتایج به سال:
Spherical assemblies of the type [PdnL2n]2n+ can be obtained from PdII salts and curved N-donor ligands, L. It is well established that bent angle, α, ligand a decisive factor in self-assembly process, with larger angles leading to complexes higher nuclearity, n. Herein, we report heteroleptic coordination cages [PdnLnL′n]2n+, for which similar correlation between angle nuclearity observed. Tet...
Concerns regarding the welfare of laying hens raised in battery cages have led to the development of enriched cages that allow hens to perform natural behaviors including nesting, roosting, and scratching. This study was conducted to compare indices of production and welfare in birds housed in 2 different caging systems. Shaver White hens were housed from 21 to 61 wk in either conventional batt...
Magnetic refrigeration is based on the magnetocaloric effect (MCE) which relies on the entropy change of a material when placed in a magnetic field.1 Molecular magnets have recently been examined in this context, especially high spin isotropic magnetic molecules.2-8 The very large MCE observed for some of these cages suggests they could be used as a replacement for helium-3 in some applications...
Standard cages prevent mice from performing several natural behaviours for which they are motivated. As a consequence, abnormal behaviours sometimes develop and mice often spend long periods inactive. To improve welfare, cages are sometimes furnished with items such as nesting material, shelters and running wheels. We have previously reported that when allowed to self-administer an anxiolytic, ...
The design of structurally defined heteroleptic coordination cages is a challenging task, and only few examples are known to date. Here we describe selection approach that allowed the identification novel hexanuclear Pd cage containing two types dipyridyl ligands. A virtual combinatorial library [PdnL2n](BF4)2n complexes was prepared by mixing six different ligands with substoichiometric amount...
The composition of fatty acids determines the flavor and quality meat. Flavor compounds are generated during cooking process by decomposition volatile via lipid oxidation. A number research on candidate genes related to acid content in livestock species have been published. majority these studies focused pigs cattle; association between meat chickens has rarely reported. Therefore, this study i...
Transition metal–boron complexes BnM have been predicted at density functional theory level to be molecular bowls (n 1⁄4 8–14) hosting a transition metal atom (M) inside or molecular tires (n 1⁄4 14) centered with a transition metal atom. Small Bn clusters prove to be effective inorganic ligands to all the VB–VIIIB transition metal elements in the periodic table. Density functional evidences ob...
1,3-Dienes derived from steroidal D-ring C 17-ketones undergo Ni(II)-catalyzed hydrovinylation to give 1,2- or 1,4-addition of ethylene. Using finely tuned phosphoramidite ligands, it is possible to synthesize either the C 20 ( R)- or ( S)-derivatives without mutual contamination. The proportion of the 1,4-adduct, which is also formed stereoselectively, can be minimized by optimizing the reacti...
Preparation and characterization of two new triptycene based polytopic Pt(II) organometallic complexes are being reported. These complexes have three trans-bromobis(trialkylphosphine)platinum(II) units directly attached to the central triptycene unit. These organoplatinum complexes were converted to the corresponding nitrate salts for subsequent use in self-assembly reactions. Characterization ...
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