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نمایش تعداد 1-10 از 7283

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    Preparation and Characterization of Novel Complexes [Cr2Co(O)(C7H4O2Cl)6(Py)3] NO3 and [Fe2Mn(O)(C7H4O2C1)6 (Py)3]N03 

    نوع: Conference Paper
    نویسنده : محمد یزدان بخش; ایمان خسروی; Mohammad Yazdanbakhsh; IMAN KHOSRAVI
    سال: 2009
    خلاصه:

    Transition-metal carboxylate chemistry has played a key role in the conceptual development of modem inorganic chemistry. The Oxo-bridge complexes of transition metal with the general composition [M30 (O2CR)6L3]zhave been of interest for several...

    Phrasal complexity in academic writing: A comparison of abstracts written by graduate students and expert writers in applied linguistics 

    نوع: Journal Paper
    نویسنده : احمد انصاری فر; حسام الدین شهریاری احمدی; رضا پیش قدم; Ahmad Ansarifar; Hesamoddin Shahriari; Reza Pishghadam
    سال: 2018
    خلاصه:

    . Biber, Gray and Poonpon (2011) have hypothesized a series of stages predicting development in writing complexity through the increased use of complex phrasal constructions. The purpose of this study is to compare abstracts by MA-level L1 Persian writers...

    A 1,2-dibenzoyl-cyclopentadiene derivative as a new potential chelating agent in geological materials 

    نوع: Journal Paper
    نویسنده : محمدحسین ارباب زوار; سیدفرامرز طیاری; Mohammad Hossein Arbab Zavar; Sayyed Faramarz Tayyari
    سال: 2007
    خلاصه:

    In this paper, 2,3-bis(p-methoxybenzoyl)cyclopentadiene(DPMBCP) has been studied as a chelating agent and pKa value was determined by means of spectrophotometric measurement. The sigmid curve of optical density agents pH ...

    The effect of phenyl substitutions on the structure and metal- ligand bond strength of copper acetylacetonate. A DFT study. 

    نوع: Conference Paper
    نویسنده : محمد وکیلی; مهنوش حکیمی تبار; علی رضا برنجی; راهله افضلی; Mohamad Vakili; Mahnoosh Hakimitabar; Ali Reza Berenji; Raheleh Afzali
    سال: 2012
    خلاصه:

    The calculated bond lengths of Cu-O and O…O are shorter in Cu(DBM)2 than the corresponding ones in Cu(AA)2 and Cu(BA)2. The Cu-O symmetric stretching frequency is higher in Cu(DBM)2 than Cu(AA)2 and Cu(BA)2. Therefore, the ...

    Synthesis, characterization, and IR investigation of novel oxo-centerted, .... 

    نوع: Conference Paper
    نویسنده : محمد یزدان بخش; ناهید لطفیان; هامان توکلی رودی; Mohammad Yazdanbakhsh; nahid lotfian
    سال: 2008
    خلاصه:

    Oxo-centered trinuclear carboxylates are a well-established class...

    CEO Pay for Complexity and the Risk of Managerial Diversion from Multinational Diversification 

    نوع: Journal Paper
    ناشر: Canadian Academic Accounting Association
    سال: 2014

    The formation constants determination of α-formyl acetylacetonate complex by pH-metric titration 

    نوع: Conference Paper
    نویسنده : مهنوش حکیمی تبار; رقیه ولی زاده; راهله افضلی; محمد وکیلی; سیدفرامرز طیاری; مینا جامی الاحمدی; Mahnoosh Hakimitabar; - -; Raheleh Afzali; Mohamad Vakili; Sayyed Faramarz Tayyari; Mina Jamialahmadi
    سال: 2013
    خلاصه:

    The copper (II) ion forms complexes with a great variety of stereochemical conformations. The stereochemistry of the copper (II) complexes appears to modulate the biological activity of the metal ion involved in many biological processes [1...

    DFT calculations and NBO analysis on stability of cis and trans isomers of bis(4-amino-3-penten-2-onato)nickel(II) 

    نوع: Conference Paper
    نویسنده : مینا جامی الاحمدی; سیدفرامرز طیاری; Mina Jamialahmadi; Sayyed Faramarz Tayyari
    سال: 2011
    خلاصه:

    The late transition metal complexes, are generally considered to be good tolerant toward polar media and thus are used as catalysts for polar monomer polymerizations [1, 2]. The aim of the present work is the modified synthesis and the improved...

    Structure and vibrational assignment of cobalt(III) formylacetylacetonate 

    نوع: Conference Paper
    نویسنده : مریم خوافی ماشی; سیدفرامرز طیاری; محمد یزدان بخش; علی رضا برنجی; maryam khafi mashi; Sayyed Faramarz Tayyari; Mohammad Yazdanbakhsh; Ali Reza Berenji
    سال: 2011
    خلاصه:

    B-diketonate complexes of various metals have been used in the preparation of supported catalysts and as precursors of heterogeneous catalysts [1,2]. In this paper, the structure and vibrational spectra of cobalt(III) formylacetylacetonate, Co(FAA)3...

    Translation Industry in the Light of Complexity Science: A Case of Iranian Context 

    نوع: Journal Paper
    نویسنده : رضا پیش قدم; نسرین اشرفی; Reza Pishghadam; Nasrin Ashrafi
    سال: 2013
    خلاصه:

    In line with the fact that multidisciplinary studies as a whole have gained momentum these days, it seems that translation studies as a relatively young discipline has recently tried to embrace new findings from other ...

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