607 research outputs found

    PENGARUH KEPEMIMPINAN TRANSFORMASIONAL DAN QUALITY PRODUCT TRAINING DALAM MENINGKATKAN KINERJA KARYAWAN DENGAN MOTIVASI SEBAGAI VARIABEL INTERVENING (STUDI PADA BANK CENTRAL ASIA KCU GANG TENGAH)

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    This study aimed to analyze the effect of Transformational Leadership, Training of Product Quality, and Motivation on Employee Performance. The selected research object in this study are employees of BCA KCU Gang Tengah, Semarang. Data were collected through questionnaires filled out independently by 120 respondents selected by random sampling method Proportionate Startified. Measurement of exogenous and endogenous constructs were tested using confirmatory factor analysis, and the results showed that the full feasibility test models are in the range of expected values. The results of this study prove and the conclusions that: (1) Transformational leadership has significant effect on the motivation, (2) Training of Product Quality has significant impact on the motivation, (3) Transformational Leadership significant effect on the performance of employees, (4 ) Training of Product Quality has significant impact on the performance of employees, (5) Motivation has significant impact on the performance of employees, (6) transformational leadership has significant impact on the performance of employees through employee motivation, and (7) Training of Product Quality has significant impact on employee performance through motivation

    Coordinatively unsaturated ruthenium complexes as efficient alkyne-azide cycloaddition catalysts

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    The performance of 16-electron ruthenium complexes with the general formula Cp*Ru(L)X (in which L = phosphine or N-heterocyclic carbene ligand; X = Cl or OCH2CF3) was explored in azide−alkyne cycloaddition reactions that afford the 1,2,3- triazole products. The scope of the Cp*Ru(PiPr3)Cl precatalyst was investigated for terminal alkynes leading to new 1,5-disubstituted 1,2,3-triazoles in high yields. Mechanistic studies were conducted and revealed a number of proposed intermediates. Cp*Ru- (PiPr3)(η2-HCCPh)Cl was observed and characterized by 1H, 13C, and 31P NMR at temperatures between 273 and 213 K. A rare example of N,N-κ2-phosphazide complex, Cp*Ru(κ2-iPr3PN3Bn)Cl, was fully characterized, and a single-crystal X-ray diffraction structure was obtained. DFT calculations describe a complete map of the catalytic reactivity with phenylacetylene and/or benzylazide.Publisher PDFPeer reviewe

    Continuous Flow Metathesis for Direct Valorization of Food Waste: An Example of Cocoa Butter Triglyceride.

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    The direct chemical conversion of cocoa butter triglycerides, a material available as a postmanufacture waste stream from the food industry, to 1-decene by way of ethenolysis is reported. The conversion of the raw waste material was made possible by use of 1 mol % of the [RuCl2(iBu-phoban)2(3-phenylindenyl)] catalyst. The process has been investigated in both batch and flow conditions, where the latter approach employs a Teflon AF-2400 tube-in-tube gas-liquid membrane contactor to deliver ethylene to the reaction system. These preliminary studies culminate in a continuous processing system, which maintained a constant output over a 150 min period tested.The ERC (Advanced Investigator Award-FUNCAT to S.P.N.) and EPSRC are gratefully acknowledged for support (S.V.L., D.L.B., Award No. EP/K009494/1). Umicore AG is acknowledged for their generous gift of materials. S.P.N. is a Royal Society Wolfson Research Merit Award holder.This is the final version of the article. It first appeared from ACS via http://dx.doi.org/10.1021/acssuschemeng.5b00397

    Hydroxide complexes of the late transition metals : organometallic chemistry and catalysis

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    Transition metal hydroxides of the late transition metals are now relatively common, and play a special role in both the synthesis of new complexes and in important catalytic reactions. The basic nature of this ligand lends these complexes to transmetallation and deprotonation reactions, while small molecules such as CO2 can insert into the metal‐oxygen bond. This review analyses and discusses the progress of this field over approximately the past decade

    Evaluation of denoising strategies to address motion-correlated artifacts in resting-state functional magnetic resonance imaging data from the human connectome roject

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    Like all resting-state functional connectivity data, the data from the Human Connectome Project (HCP) are adversely affected by structured noise artifacts arising from head motion and physiological processes. Functional connectivity estimates (Pearson's correlation coefficients) were inflated for high-motion time points and for high-motion participants. This inflation occurred across the brain, suggesting the presence of globally distributed artifacts. The degree of inflation was further increased for connections between nearby regions compared with distant regions, suggesting the presence of distance-dependent spatially specific artifacts. We evaluated several denoising methods: censoring high-motion time points, motion regression, the FMRIB independent component analysis-based X-noiseifier (FIX), and mean grayordinate time series regression (MGTR; as a proxy for global signal regression). The results suggest that FIX denoising reduced both types of artifacts, but left substantial global artifacts behind. MGTR significantly reduced global artifacts, but left substantial spatially specific artifacts behind. Censoring high-motion time points resulted in a small reduction of distance-dependent and global artifacts, eliminating neither type. All denoising strategies left differences between high- and low-motion participants, but only MGTR substantially reduced those differences. Ultimately, functional connectivity estimates from HCP data showed spatially specific and globally distributed artifacts, and the most effective approach to address both types of motion-correlated artifacts was a combination of FIX and MGTR

    Gold(I)-N-Heterocyclic Carbene Synthons in Organometallic Synthesis

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    The prominent role of gold-N-heterocyclic carbene (NHC) complexes in numerous research areas such as homogeneous (photo)catalysis, medicinal chemistry and materials science has prompted organometallic chemists to design gold-based synthons that permit access to target complexes through simple synthetic steps under mild conditions. In this review, the main gold-NHC synthons employed in organometallic synthesis are discussed. Mechanistic aspects involved in their synthesis and reactivity as well as applications of gold-NHC synthons as efficient pre-catalysts, antitumor agents and/or photo-emissive materials are presented

    Quantifying and understanding the steric properties of N-heterocyclic carbenes

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    This Feature Article presents and discusses the use of different methods to quantify and explore the steric impact of N-heterocyclic carbene (NHC) ligands. These include a) the percent buried volume (%Vbur), which provides a convenient single number to measure steric impact and b) steric maps, which provide a graphical representation of the steric topology of a ligand using colour-coded contour maps. A critical discussion of the scope and limitations of these tools is presented, along with some examples of their use in organometallic chemistry and catalysis. This Article should provide all users of NHCs ( and of other ligand families) from organic, organometallic, and inorganic chemistry backgrounds, with an appreciation of how these tools can be used to quantify and compare ligand steric properties

    Synthesis, characterization and catalytic activity of stable [(NHC)H][ZnXY2] (NHC = N-Heterocyclic carbene, X, Y = Cl, Br) species

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    The authors gratefully acknowledge the Royal Society (University Research Fellowship to C.S.J.C) and the EPSRC (EP/J500549/1, EP/K00445X/1) for funding. S.P. N. acknowledges support from KSU.The synthesis and characterization of imidazol(in)ium-based zinc(II) halide salts are reported. These compounds present interesting structural features and exhibit high stability. Their catalytic activity was explored in the methylation of amines with CO2 and PhSiH3.PostprintPeer reviewe

    Synthesis of cyclobutane-fused chromanones via gold-mediated photocatalysis

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    Energy transfer (EnT) photocatalysis has emerged as a valuable tool for constructing complex organic scaffolds via [2 + 2]-cycloaddition reactions. Herein, we present the use of [Au(SIPr)(Cbz)] as a sensitizer for the [2 + 2]-cycloaddition of coumarins and unactivated alkenes. Widely used in EnT catalysis, iridium and organic sensitizers proved less efficient under the examined catalytic conditions. The developed protocol permits the synthesis of cyclobutane-fused chromanones from readily available starting materials. A wide range of alkenes and substituted coumarins, including naturally occurring compounds, were reacted under mild conditions leading to structurally complex products with good functional group tolerance. Mechanistic studies reveal a previously overlooked reaction pathway for energy transfer catalysis involving coumarins

    [Pd(NHC)(μ-Cl)Cl]2 : versatile and highly reactive complexes for cross-coupling reactions that avoid formation of inactive Pd(I) off-cycle products

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    Authors thank Rutgers University (M.S.), the NSF (CAREER CHE-1650766, M.S.), and the NIH (1R35GM133326, M.S.) for financial support. The Bruker 500 MHz spectrometer used in this study was supported by the NSF-MRI grant (CHE-1229030). For work conducted in Belgium, S.P.N. and C.S.J.C. wish to thank the UGent BOF (starter and senior research grants). Umicore AG is thanked for gifts of materials. A.P. is a Serra Húnter Fellow and ICREA Academia Prize 2019 holder. A.P. thanks the Spanish MICINN for project PGC2018-097722-B-I00.The development of more reactive, general, easily accessible, and readily available Pd(II)–NHC precatalysts remains a key challenge in homogeneous catalysis. In this study, we establish air-stable NHC–Pd(II) chloro-dimers, [Pd(NHC)(μ-Cl)Cl]2, as the most reactive Pd(II)–NHC catalysts developed to date. Most crucially, compared with [Pd(NHC)(allyl)Cl] complexes, replacement of the allyl throw-away ligand with chloride allows for a more facile activation step, while effectively preventing the formation of off-cycle [Pd2(μ-allyl)(μ-Cl)(NHC)2] products. The utility is demonstrated via broad compatibility with amide cross-coupling, Suzuki cross-coupling, and the direct, late-stage functionalization of pharmaceuticals. Computational studies provide key insight into the NHC–Pd(II) chloro-dimer activation pathway. A facile synthesis of NHC–Pd(II) chloro-dimers in one-pot from NHC salts is reported. Considering the tremendous utility of Pd-catalyzed cross-coupling reactions and the overwhelming success of [Pd(NHC)(allyl)Cl] precatalysts, we believe that NHC–Pd(II) chloro-dimers, [Pd(NHC)(μ-Cl)Cl]2, should be considered as go-to precatalysts of choice in cross-coupling processes.Publisher PDFPeer reviewe
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