Barf

The association of lanthanide ions and paracyclophane derivatives has been very scarcely reported in the literature. In this study, elaboration of five coordination lanthanide complexes involving the 1,4(1,4)-dibenzenacyclohexaphane-12 ,43 -diylbis(diphenylphosphine oxide) ligand ( L ) was achieved with the determination of single-crystal X-ray diffraction structures of four mononuclear complexes of formula [Ln(hfac)3 ( L )] (hfac- = 1,1,1,5,5,5-hexafluoroacetylacetonate) (Ln = Dy(III) (1-Dy) and Yb(III) (2-Yb)) and [Ln(tta)3 ( L )] (tta- = 2-tenoyl-trifluoroacetylacetonate) (Ln = Dy(III) (3-Dy) and Yb(III) (4-Yb)) and one dinuclear complex [Na(Dy2 (hfac)6 ( L )2 )](BArF) (BArF- = tetrakis[3,5-bis(trifluoromethyl)phenyl]borate) (5-Dy)...

The low-electron count, air-stable, platinum complexes [Pt(ItBu')(ItBu)][BArF] (C1) (ItBu=1,3-di-tert-butylimidazol-2-ylidene), [Pt(SiPh)3(ItBuiPr)2][BArF] (C2) (ItBuiPr = 1-tert-butyl-3-iso-propylimidazol-2-ylidene),  [Pt(SiPh)3(ItBuMe)2][BArF] (C3), [Pt(GePh3)(ItBuiPr)2][BArF] (C4), [Pt(GePh)3(ItBuMe)2][BArF] (C5) and [Pt(GeEt)3(ItBuMe)2][BArF] (C6)  (ItBuMe = 1-tert-butyl-3-methylimidazol-2-ylidene) are efficient catalysts (particularly the germyl derivatives) in both the silylative dehydrocoupling and hydrosilylation of electron rich alkenes derived from enamines...

Crystallization of the verdazyl-based valence tautomeric ion [Co(dipyvd)2 ]2+ (where dipyvd is the radical ligand 1-isopropyl-3,5-di(2'-pyridyl)-6-oxoverdazyl) with a variety of different counterions results in materials that show varying degrees of valence tautomeric (VT) transition in the solid state. The X-ray structure of the SbF6 salt at 150 K reveals a localized structure for the S = 1/2 tautomer, with a Co3+ cation and distinct anionic and radical ligands. Comparison with the structure of the same material at 300 K reveals large structural changes in the ligand as a result of the valence tautomeric equilibrium...

Reported is the reaction of a series of iron(II) bisphosphine complexes with PH3 in the presence of NaBArF 4 [where BArF 4 = tetrakis(3,5-bis(trifluoromethyl)phenyl)borate]. The iron(II) bisphosphine reagents bear two chlorides or a hydride and a chloride motif. We have isolated six different cationic terminal-bound PH3 complexes and undertaken rigorous characterization by NMR spectroscopy, single crystal X-ray diffraction, and mass spectrometry, where the PH3 often remains intact during the ionization process...

Raw meat-based diets for pet nutrition are becoming increasingly popular. The percentage of meat content, composition of nutrients, and amount of additives started to play an important role in the recipe of a given food. However, the use of healthier and unprocessed food must also be balanced with the animal's specific needs based on its anatomy, physiology, and behavior. There are many potential advantages and disadvantages of a biologically appropriate raw food (BARF) diet, and all of them should be considered before switching to this approach...

The formation of isolable monatomic BiI complexes and BiII radical species is challenging due to the pronounced reducing nature of metallic bismuth. Here, we report a convenient strategy to tame BiI and BiII atoms by taking advantage of the redox noninnocent character of a new chelating bis(germylene) ligand. The remarkably stable novel BiI cation complex 4 , supported by the new bis(iminophosphonamido-germylene)xanthene ligand [(P)GeII (Xant)GeII (P)] 1 , [(P)GeII (Xant)GeII (P) = Ph2 P(N t Bu)2 GeII (Xant)GeII (N t Bu)2 PPh2 , Xant = 9,9-dimethyl-xanthene-4,5-diyl], was synthesized by a two-electron reduction of the cationic BiIII I2 precursor complex 3 with cobaltocene (Cp2 Co) in a molar ratio of 1:2...

Several metallocenium derivatives were prepared including N -ferrocenium- N '-phenylthiourea tetrakis-[3,5-bis(trifluoromethyl)phenyl]borate (BArF 4 , 4a), N -methylferrocenium- N '-phenylthiourea BArF 4 (4b) and N -cobaltocenium- N '-phenylthiourea BArF 4 (5). These compounds are competent catalysts for the Friedel-Crafts alkylation of indoles with trans -β-nitrostyrenes, and are much more active than their reduced non-charged forms. The iron derivatives are less stable than the cobalt analog and were generated and used in situ whereas the cobalt-containing thiourea was isolated and characterized by X-ray crystallography...

Considering the original nature of carnivorism among dogs and cats, nowadays these pets are increasingly fed BARF (Biologically Appropriate Raw Food/Bone And Raw Food) diet to improve their health conditions. However, this diet may also carry health risks, such as vitamin or mineral deficiencies, and infection with pathogens including parasites. In our study, fecal samples of 89 pet animals kept on BARF diet were subjected to coprological examination followed by molecular analyses. Six of them shed eggs of Dicrocoelium dendriticum...

AIM: The purpose of this research was to examine the effects of listening to music and foot reflexology during the perioperative period on nausea, pain and anxiety in children aged 7-12 years. MATERIAL AND METHOD: The sample for the randomized controlled experimental study included children who underwent outpatient surgery in the Pediatric Surgery Clinic. Research data were collected. A total of 99 children were included in the study with 33 in the music group, 33 in the foot reflexology group, and 33 in the control group...

NHC-phosphinidene (NHCP) adducts are an emerging class of ligands with proven binding ability for main group and transition metal elements. They possess electron-rich P atoms with two lone pairs (LPs) of electrons, making them interesting platforms for the formation of multimetallic complexes. We describe herein a modular, high-yielding synthesis of bis(NHCP)s, starting from alkylidene-bridged bis(NHC)s ((IMe)2 Cn H2n ; n = 1,3) and triphosphirane (PDip)3 (Dip = 2,6- i Pr2 C6 H3 ) as phosphinidene transfer reagent...

eq -4- O -Acyl group directed β-rhamnosylation and β-mannosylation are achieved in a carborane or BARF anion formed weakly nucleophilic environment with the assistance of a 2,3-orthocarbonate group. The 4- O -acyl group plays a critical role in directing the β-selectivity, and the weakly coordinating anion is essential to amplify this direction. The orthocarbonate group could be readily removed with 1,3-propanediol in the presence of BF3 ·Et2 O.

The group 7 complexes [M(κ3 -2,6-(R2 PO)2 C5 H3 N)(CO)2 L][BArF 4 ] [M = Mn, R = i Pr, L = THF; M = Re, R = t Bu, L = vacant site] undergo in crystallo solid-gas reactivity with CO to form the products of THF substitution or CO addition respectively. There is a large, local, adaptive change of [BArF 4 ] anions for M = Mn, whereas for M = Re the changes are smaller and also remote to the site of reactivity.

A series of chiral bowl-shaped diruthenium(II,III) tetracarboxylate catalysts were prepared and evaluated in asymmetric cyclopropanations with donor/acceptor carbenes derived from aryldiazoacetates. The diruthenium catalysts self-assembled to generate C 4 -symmetric bowl-shaped structures in an analogous manner to their dirhodium counterparts. The optimum catalyst was found to be Ru2 ( S -TPPTTL)4 ·BArF [ S -TPPTTL = ( S )-2-(1,3-dioxo-4,5,6,7-tetraphenylisoindolin-2-yl)-3,3-dimethylbutanoate, BArF = tetrakis(3,5-bis(trifluoromethyl)phenyl)borate], which resulted in the cyclopropanation of a range of substrates in up to 94% ee...

Introduction of Crabtree's iridium-based hydrogenation catalyst in 1977 marked a paradigm shift both with respect to the role of iridium in homogeneous catalysis as well as catalytic hy-dro-genation of olefins. In 1998, Pfaltz introduced an improved catalyst, by use of BARF- as anion, and established the first chiral variant of the Crabtree catalyst. This led to nume-rous practical highly enantioselective syntheses. Elucidation of mechanistic de-tails posed great problems because of instability of the crucial intermediates...

BACKGROUND: Diet is known to strongly modulate the composition of the gut microbiota, thereby affecting health conditions and disease. Natural BARF-type and commercial diets have been used for feeding pets (e.g. dogs and cats) promoting changes in the canine microbiota in terms of abundance, richness, and diversity that may favor certain metabolic processes and resistance to certain infectious agents. Therefore, the present study sought to identify microbiota changes in dogs fed with a BARF-type diet versus dogs fed with a commercial diet by sequencing the V4 region of the 16S rRNA gene...

The tandem isomerization-hydrosilylation reaction is a highly valuable process able to transform mixtures of internal olefins into linear silanes. Unsaturated and cationic hydrido-silyl-Rh(III) complexes have proven to be effective catalysts for this reaction. Herein, three silicon-based bidentate ligands, 8-(dimethylsilyl)quinoline (L1), 8-(dimethylsilyl)-2-methylquinoline (L2) and 4-(dimethylsilyl)-9-phenylacridine (L3), have been used to synthesize three neutral [RhCl(H)(L)PPh3 ] (1-L1, 1-L2 and 1-L3) and three cationic [Rh(H)(L)(PPh3 )2 ][BArF 4 ] (2-L1, 2-L2 and 2-L3) Rh(III) complexes...

PURPOSE: This study aimed to determine the effects of menthol gum chewing on nausea, vomiting, and length of hospital stay after appendectomy in children. BACKGROUND: Postoperative nausea and vomiting (PONV) can be induced by general anesthesia. Several drugs are available to reduce the risk of PONV; however, their cost and side effects limit their clinical use. METHOD: This was a randomized controlled clinical trial that included 60 children aged 7-18 years who underwent an appendectomy at the Pediatric Surgery Clinic of a tertiary hospital between April and June 2022...

One-electron oxidation of palladium(0) and platinum(0) bis(phosphine) complexes enables isolation of a homologous series of linear d9 metalloradicals of the form [M(PR3 )2 ]+ (M = Pd, Pt; R = t Bu, Ad), which are stable in 1,2-difluorobenzene (DFB) solution for >1 day at room temperature when partnered with the weakly coordinating [BArF 4 ]- (ArF = 3,5-(CF3 )2 C6 H3 ) counterion. The metalloradicals exhibit reduced stability in THF, decreasing in the order palladium(I) > platinum(I) and PAd3 > P t Bu3 , especially in the case of [Pt(P t Bu3 )2 ]+ , which is converted into a 1:1 mixture of the platinum(II) complexes [Pt(P t Bu2 CMe2 CH2 )(P t Bu3 )]+ and [Pt(P t Bu3 )2 H]+ upon dissolution at room temperature...

We report the synthesis and solid-state structures of DMAP-coordinated ([L(DMAP)GaPn]2 [OTf]2 ; Pn = Sb 3, Bi 4) and base-free dipnictene dications ([LGaPn]2 [BArF x ]2 , Pn = Sb: x = 24, 5a; 20, 5b; Bi: x = 24, 6a; 20, 6b). Quantum chemical calculations indicate that the dications 52+ and 62+ represent isoelectronic analogues of the butadiene dication.

We report on the synthesis of an authentic Sn═B-moiety realized in a stannaborenyl anion and stannaborenium cation. Starting with an oxidative addition of boron tribromide to a stannylene-phosphine Lewis pair [ o -C6 H4 (Ar*BrSn-BBr2 -PPh2 )] ( 2a ) [Ar* = C6 H3 (2,6-Trip)2 , Trip = 2,4,6-C6 H2 i Pr3 ] was synthesized. Reduction of 2a with magnesium yields the Grignard-type stannaborene [ o -C6 H4 (Ar*Sn═B{PPh2 }MgBr{thf})]2 ( 3 )2 featuring a Sn═B double bond and a B-Mg interaction. Following an alternative protocol, hydride substitution at 2a yields the tinhydride [ o -C6 H4 (Ar*HSn-BBr2 -PPh2 )] ( 4a )...