Structure and magnetic properties of copper(II) and cobalt(II) coordination compounds derived from optically active tridentate ligands

ávila-Torres Y.; López-Sandoval H.; Mijangos E.; Quintanar L.; Rodríguez E.E.; Flores-Parra A.; Contreras R.; Vicente R.; Rikken G.L.J.A.; Barba-Behrens N.

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Structure and magnetic properties of copper(II) and cobalt(II) coordination compounds derived from optically active tridentate ligands

机译：光学活性三齿配体衍生的铜（II）和钴（II）配位化合物的结构和磁性

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Trinuclear cobalt(II) and copper(II) complexes of the deprotonated N-[2-hydroxy-1(R)-methyl-2(R)-phenylethyl]-N-methylglycine (R,R(-)(H _2cpse)) or N-[2-hydroxy-1(S)-methyl-2(S)-phenylethyl]-N-methylglycine (S,S(+)(H_2cpse)) were prepared from the corresponding mononuclear compounds [M(Hcpse)_2]·nH_2O with the acetyl amino alcohol derivative. The crystal structure of the trinuclear copper(II) [Cu _3(R,R(-)cpse)_3(H_2O)_3]·8H _2O (5) consists of three Cu~(2+) atoms with distorted square pyramidal geometry, linked by bridging oxygens from the deprotonated alcohol group to form an equilateral triangular array. This compound displays an antiferromagnetic coupling attributed to intermolecular hydrogen bonding, allowing for super-exchange pathway. The iso-structural trinuclear cobalt(II) compound [Co_3(S,S(+)cpse)_3(H_2O) _3]·7H_2O (6) presents a super-paramagnetic behavior. On the other hand, a polymeric copper(II) compound {K_2[Cu _2(S,S(+)cpse)_2(SCN)_2]·H _2O}n (7) was obtained from previously reported trinuclear [Cu_3(S,S(+)cpse)_3(H_2O)_3] ·8H_2O. This polymeric structure involves potassium ions together with the thiocyanate molecules forming a helicoidal arrangement on the c axis, presenting a ferromagnetic behavior.

机译：去质子化的N- [2-羟基-1（R）-甲基-2（R）-苯乙基] -N-甲基甘氨酸（R，R（-）（H _2cpse）的三核钴（II）和铜（II）配合物）或N- [2-羟基-1（S）-甲基-2（S）-苯乙基] -N-甲基甘氨酸（S，S（+）（H_2cpse））由相应的单核化合物[M（Hcpse） _2]·nH_2O与乙酰氨基醇衍生物。三核铜（II）[Cu _3（R，R（-）cpse）_3（H_2O）_3]·8H _2O（5）的晶体结构由三个扭曲的方形金字塔形状的Cu〜（2+）原子组成，通过桥接来自去质子化醇基团的氧而连接起来，形成等边三角形阵列。该化合物表现出归因于分子间氢键的反铁磁耦合，从而允许超交换途径。异结构三核钴（II）化合物[Co_3（S，S（+）cpse）_3（H_2O）_3]·7H_2O（6）表现出超顺磁行为。另一方面，聚合铜（II）化合物{K_2 [Cu _2（S，S（+，cpse）_2（SCN）_2]·H _2O} n（7）从先前报道的三核[Cu_3（S ，S（+）cpse）_3（H_2O）_3]·8H_2O。这种聚合结构涉及钾离子和硫氰酸酯分子，在c轴上形成螺旋形排列，表现出铁磁行为。

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《Polyhedron: The International Journal for Inorganic and Organometallic Chemistry》 |2013年第null期|共9页
作者
ávila-Torres Y.; López-Sandoval H.; Mijangos E.; Quintanar L.; Rodríguez E.E.; Flores-Parra A.; Contreras R.; Vicente R.; Rikken G.L.J.A.; Barba-Behrens N.;
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正文语种 eng
中图分类无机化学;
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Anti-ferromagnetism; Chiral aminoalcohols; Ferromagnetism; Super-paramagnetism; Trinuclear CoII and CuII complexes;

机译：反铁磁性;手性氨基醇;铁磁性;超顺磁性;三核CoII和CuII配合物;

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Structure and magnetic properties of copper(II) and cobalt(II) coordination compounds derived from optically active tridentate ligands

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