یک پلیمر کوئوردیناسیونی از منگنز(III) با پیریدین-3،2-دی کربوکسیلیک اسید و 4، 4-بی‌پیریدین

نویسندگان

دانشگاه ایلام

چکیده

ترکیب پلیمری {(C10H9N2)[Mn(C7H3NO4)2].(C10H8N2).6H2O}n از واکنش منگنز(II) نیترات شش آبه با پیریدین-2، 3- دی کربوکسیک اسید(py-2,3-dcH2)  و 4،َ4- بی پیریدین (4,4´-bipy)،  با نسبت مولی 1:2:4 تهیه شد. سیستم بلوری این کمپلکس مونوکلینیک با گروه فضایی P21/n و چهار مولکول در سلول واحد می­باشد. ابعاد سلول واحد Å­a = 22.2099(15) ،
 Å­b = 6.6599(4) ، Å c = 23.5921(16) و β = 104.014(3) ° هستند. مقدار R نهایی آن 04/0 برای 8960 بازتاب است. اتم مرکزی به دو لیگاند از طریق اتم­های اکسیژن و نیتروژن در یک آرایش مربع مسطح متصل شده است و دو اتم اکسیژن گروه­های کربوکسیلات پل، زنجیرهای مولکول را شکل می­دهند. بنابراین کمپلکس آنیونی(III)Mn شش کوئوردینه با هندسه هشت وجهی واپیچیده است. در ساختار بلوری گستره وسیعی از برهم­کنش­های غیر کووالانسی شامل پیوندهای هیدروژنی (از نوع O−H···O, O−H···N و C−H···O)، جفت یون، بر هم­کنش­های انباشتگی π–π (با فواصل مرکز تا مرکز  برابر 607/3 و Å 721/3)، C−H···π (با فاصله H···π  برابر Å 941/2) وC = O···π  (با فواصل O···π  برابر 699/3 و Å 702/3) ساختار ابرمولکول را پایدار می­کنند.

کلیدواژه‌ها

عنوان مقاله [English]

A coordination polymer of Mn (III) with pyridine-2, 3-dicarboxylic acid and 4,4′-bipyridine

چکیده [English]

The polymeric compound, {(C10H9N2)[Mn(C7H3NO4)2].­(C10H8N2).6H2O}n, was prepared by the reaction of manganese (II) nitrate with pyridine-2,3-dicarboxylic acid, (py-2,3-dcH2) and 4,4'-bipyridine (4,4'-bipy) in a 1:2:4 molar ratio. The crystal system of the complex is monoclinic with space group P21/n and four molecules per unit cell. The unit cell parameters are: a = 22.2099(15) Å, b = 6.6599(4) Å,
c = 23.5921(16) Å and β = 104.014(3)­°.  The final R value was 0.04 based on 8960 reflections. The central atom is attached to two (py-2,3-dc)2– ligands through their N and O atoms in a planar square arrangement and two O atoms from bridging carboxylate groups, forming polymeric chains. So, the anionic complex features six-coordinate Mn (III) with a distorted octahedral geometry. In the crystal structure, a wide range of non-covalent interactions consisting of hydrogen bonding (of the types O−H···O, O−H···N and C−H···O), ion pairing, and π–π (centroid-centroid distances of 3.607 and 3.721 Å), C−H···π (with H···π distance of 2.941 Å) and C=O···π (with O···π distances of 2.943, 3.702 and 3.743 Å)  stacking interactions stabilize the supramolecular structure.

کلیدواژه‌ها [English]

  • Mn (III) complex
  • 4
  • 4'-bipyridine
  • crystal structure
  • hydrogen bonding

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  • تاریخ دریافت: 11 تیر 1404
  • تاریخ بازنگری: 15 بهمن 1404
  • تاریخ پذیرش: 11 تیر 1404

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