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首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >THERMAL STUDIES OF N-PROPYLETHANE-1,2-DIAMINE AND N-ISOPROPYLETHANE-1,2-DIAMINE COMPLEXES OF NICKEL(II) IN THE SOLID STATE
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THERMAL STUDIES OF N-PROPYLETHANE-1,2-DIAMINE AND N-ISOPROPYLETHANE-1,2-DIAMINE COMPLEXES OF NICKEL(II) IN THE SOLID STATE

机译:固态状态下镍(II)的N-丙烯基1,2-二胺和N-异丙烯基1,2-二胺络合物的热学研究

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NiL(3)]X(2) . H2O (X is Cl-, Br- and ClO4-; L is N-propylethane-1,2-diamine), [NiL(2)(H2O)(2)](ClO4)(2), [NiL(2)X(2)](X is Cl-, Br-, 0.5SO(4)(2-) and 0.5SeO(4)(2-)), [NiL(2)'(H2O)(2)](ClO4)(2) . 2H(2)O (L' is N-isopropylethane-1,2-diamine), [NiL(2)'X(2)] (X is Cl-, Br-, NCS- and 0.5SeO(4)(2-)) and [NiL(2)'SO4]. 3H(2)O have been synthesised from solution and their thermal studies have been carried out in the solid phase. [NiL(2)X(2)] (X is Cl- and Br-), NiLCl(2) and NiL'SO4 have been prepared pyrolytically from their respective parent species in the solid state. [NiL(2)](ClO4)(2) and [NiL(2)'](ClO4)(2) were prepared pyrolytically from their parents species, and also by storing [NiL(2)(H2O)(2)](ClO4)(2) and [NiL(2)'(H2O)(2)](ClO4)(2) . 2H(2)O in a CaCl2 desiccator, respectively; these transformations are accompanied by a pink to yellow colour change due to octahedral to square-planar configurational changes. All other bis(diamine) species have octahedral geometry. Among them, [NiL(2)X(2)] (X is Cl- and Br-) and [NiL(2)'X(2)] (X is Cl-, Br- and NCS-) possess trans-octahedral configuration, whereas [NiL(2)X] (X is SO42- and SeO42-), [NiL(2)'SO4]. 3H(2)O and [NiL(2)'SeO4] have cis-configuration. On heating, trans-[NiL(2)'Br-2] and trans-[NiL(2)'(NCS)(2)] undergo reversible endothermic phase transitions (86-99 degrees C, Delta H = 0.52 kJ mol(-1) for heating, and 92-81 degrees C, Delta H = -0.53 kJ mol(-1) for cooling for the former, and 162-224 degrees C, Delta H = 0.27 kJ mol(-) for heating and 208-150 degrees C, Delta H = -0.25 kJ mol(-1) for cooling for the latter), most likely due to conformational changes of the diamine chelate rings. [References: 19
机译:NiL(3)] X(2)。 H2O(X是Cl-,Br-和ClO4-; L是N-丙基乙烷-1,2-二胺),[NiL(2)(H2O)(2)](ClO4)(2),[NiL(2) X(2)](X是Cl-,Br-,0.5SO(4)(2-)和0.5SeO(4)(2-)),[NiL(2)'(H2O)(2)](ClO4 )(2)。 2H(2)O(L'是N-异丙基乙烷-1,2-二胺),[NiL(2)'X(2)](X是Cl-,Br-,NCS-和0.5SeO(4)(2 -))和[NiL(2)'SO4]。从溶液中合成了3H(2)O,并已在固相中进行了热学研究。 [NiL(2)X(2)](X为Cl-和Br-),NiLCl(2)和NiL'SO4已从它们各自的固态母体经热解制备。 [NiL(2)](ClO4)(2)和[NiL(2)'](ClO4)(2)由它们的母体热解制备,也通过储存[NiL(2)(H2O)(2)]制备。 (ClO4)(2)和[NiL(2)'(H2O)(2)](ClO4)(2)。 CaH2干燥器中分别为2H(2)O;由于八面体到方形平面的构型变化,这些转变伴随着粉红色到黄色的变化。所有其他双(二胺)物种均具有八面体几何形状。其中,[NiL(2)X(2)](X为Cl-和Br-)和[NiL(2)'X(2)](X为Cl-,Br-和NCS-)具有反八面体构型,而[NiL(2)X](X是SO42-和SeO42-),[NiL(2)'SO4]。 3H(2)O和[NiL(2)'SeO4]具有顺式构型。加热时,反式[NiL(2)'Br-2]和反式[NiL(2)'(NCS)(2)]经历可逆的吸热相变(86-99摄氏度,Delta H = 0.52 kJ mol( -1。 -150摄氏度,Delta H = -0.25 kJ mol(-1)进行冷却,这很可能是由于二胺螯合环的构象变化所致。 [参考:19

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