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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 39, Number 9
JKCSEZ 39(9)
June 20, 1995 

 
Title
Synthesis and Structural Characterization of Optically Active Bis (L-Prolinato)(2,2'-bipyridine)Co(Ⅲ) and Bis(L-Prolinato)(1,10-phenanthroline) Co(Ⅲ)

광학활성 비스 (L-Prolinato)(2,2'-bipyridine) 코발트 (Ⅲ) 와 비스 (L-Prolinato)(1,10-phenanthroline) 코발트 (Ⅲ) 의 합성과 구조적인 특성)
Author
Chang Eon Oh*, Bok Jo Kim, Doo Cheon Yoon, Myung Ki Doh, Nam Ho Heo

오창언*, 김복조, 윤두천, 도명기, 허남호
Keywords
Abstract
trans-[Co(py)4Cl2]+(py=pyridine)과 L-proline 및 diimine(=2,2'-bipyridine, 1,10-phenanthroline)과의 반응에서 [Co(L-pro)2(bipy)]+(L-pro=L-prolinato, bipy=2,2'-bipyridine)과 [Co(L-pro)2(phen)]+(phen=1,10-phenanthroline)이 각각 생성되었다. 관 크로마토그래피상에서 입체특이성을 가지는 L-prolinato의 입체선택성으로 인하여 [Co(L-pro)2(bipy)]+에서는 Λ-trans(N)만이 얻어졌고 [Co(L-pro)2(phen)]+에서는 Δ-trans(N) 과 Λ-cis(O)cis(N)이 얻어졌다. 결정구조 연구의 결과는 다음과 같다: Λ-trans(N)-[Co(L-pro)2(bipy)]ClO4·2H2O (1): monoclinic, space group P21 (#4), a=9.807(3), b=10.421(1), c=12.778(2) Å, β=109.90(2)°, V=1227.8(5) Å3, Z=2; 1571 data (I > 3.0σ(I)) R=0.060, Rw=0.067; Δ-trans(N)-[Co(L-pro)2(phen)]Cl·3H2O(2): monoclinic, space group P21 (#4), a=9.838(2), b=12.892(2), c=10.747(2) Å, β=113.79(2)°, V=1247.2(4) Å3, Z=2; 2433 data(I > 3.0σ(I)) R=0.043 and Rw=0.050.

Raction between trans-[Co(py)4Cl2]+ and L-proline and diimine (=2,2'-bipyridine, 1,10-phenanthroline) gives two products, [Co(L-pro)2(bipy)]+ and [Co(L-pro)2(phen)]+ complexes, respectively. On column chromatography, [Co(L-pro)2(bipy)]+ was obtained only as Λ-trans(N) and [Co(L-pro)2(phen)]+ was obtained both as Δ-trans(N) and Λ-cis(O)cis(N) due to the stereoselectivity of L-prolinato which was stereospecific. Crystal data are as follows: Λ-trans(N)-[Co(L-pro)2(bipy)]ClO4·2H2O (1): monoclinic, space group P21 (#4), a=9.807(3), b=10.421(1), c=12.778(2) Å, β=109.90(2)°, V=1227.8(5) Å3, Z=2; 1571 data with I > 3.0σ(I) were refined to R=0.060, Rw=0.067; Δ-trans(N)-[Co(L-pro)2(phen)]Cl·3H2O(2): monoclinic, space group P21 (#4), a=9.838(2), b=12.892(2), c=10.747(2) Å, β=113.79(2)°, V=1247.2(4) Å3, Z=2; 2433 data with I > 3.0σ(I) were refined to R=0.043, Rw=0.050.

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715 - 721
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