Temperature-dependent in situ ligand cyclization via C=C coupling and formation of a spin-crossover iron(II) coordination polymer

Feng Lei Yang; Jun Tao; Rong Bin Huang; Lan Sun Zheng

doi:10.1021/ic101490a

Temperature-dependent in situ ligand cyclization via C=C coupling and formation of a spin-crossover iron(II) coordination polymer

Feng Lei Yang, Jun Tao^*, Rong Bin Huang, Lan Sun Zheng

^*Corresponding author for this work

Xiamen University

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

The reaction of N1 ,N2-bis(pyridin-4-ylmethylene)ethane-1,2-diamine (L) with Fe(NCS)₂ under various temperatures gave rise to three iron(II) coordination polymers, namely, one-dimensional [Fe(L')(NCS)₂](1), two-dimensional [Fe(L)₂(NCS)₂] H₂O (2), and one-dimensional [Fe(L)₂(NCS)₂] 2CH₂Cl ₂ 4MeOH (3). The formation of 1 involved an in situ C=C coupling reaction, L to L' [L' = 5,6-di(pyridin-4-yl)-1,2,3,4-tetrahydropyrazine], which was catalyzed by cyanide ions decomposed from thiocyanates; the manganese(II)(1a) and zinc(II)(1b) analogues of 1 were also synthesized for comparison. Magnetic studies showed that complex 1 underwent a pressure-dependent one-step incomplete spin transition whereas complexes 2 and 3 were paramagnetic in the whole temperature range.

Original language	English
Pages (from-to)	911-917
Number of pages	7
Journal	Inorganic Chemistry
Volume	50
Issue number	3
DOIs	https://doi.org/10.1021/ic101490a
Publication status	Published - 7 Feb 2011
Externally published	Yes

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title = "Temperature-dependent in situ ligand cyclization via C=C coupling and formation of a spin-crossover iron(II) coordination polymer",

abstract = "The reaction of N1 ,N2-bis(pyridin-4-ylmethylene)ethane-1,2-diamine (L) with Fe(NCS)2 under various temperatures gave rise to three iron(II) coordination polymers, namely, one-dimensional [Fe(L')(NCS)2](1), two-dimensional [Fe(L)2(NCS)2] H2O (2), and one-dimensional [Fe(L)2(NCS)2] 2CH2Cl 2 4MeOH (3). The formation of 1 involved an in situ C=C coupling reaction, L to L' [L' = 5,6-di(pyridin-4-yl)-1,2,3,4-tetrahydropyrazine], which was catalyzed by cyanide ions decomposed from thiocyanates; the manganese(II)(1a) and zinc(II)(1b) analogues of 1 were also synthesized for comparison. Magnetic studies showed that complex 1 underwent a pressure-dependent one-step incomplete spin transition whereas complexes 2 and 3 were paramagnetic in the whole temperature range.",

author = "Yang, {Feng Lei} and Jun Tao and Huang, {Rong Bin} and Zheng, {Lan Sun}",

year = "2011",

month = feb,

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doi = "10.1021/ic101490a",

language = "English",

volume = "50",

pages = "911--917",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "3",

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TY - JOUR

T1 - Temperature-dependent in situ ligand cyclization via C=C coupling and formation of a spin-crossover iron(II) coordination polymer

AU - Yang, Feng Lei

AU - Tao, Jun

AU - Huang, Rong Bin

AU - Zheng, Lan Sun

PY - 2011/2/7

Y1 - 2011/2/7

N2 - The reaction of N1 ,N2-bis(pyridin-4-ylmethylene)ethane-1,2-diamine (L) with Fe(NCS)2 under various temperatures gave rise to three iron(II) coordination polymers, namely, one-dimensional [Fe(L')(NCS)2](1), two-dimensional [Fe(L)2(NCS)2] H2O (2), and one-dimensional [Fe(L)2(NCS)2] 2CH2Cl 2 4MeOH (3). The formation of 1 involved an in situ C=C coupling reaction, L to L' [L' = 5,6-di(pyridin-4-yl)-1,2,3,4-tetrahydropyrazine], which was catalyzed by cyanide ions decomposed from thiocyanates; the manganese(II)(1a) and zinc(II)(1b) analogues of 1 were also synthesized for comparison. Magnetic studies showed that complex 1 underwent a pressure-dependent one-step incomplete spin transition whereas complexes 2 and 3 were paramagnetic in the whole temperature range.

AB - The reaction of N1 ,N2-bis(pyridin-4-ylmethylene)ethane-1,2-diamine (L) with Fe(NCS)2 under various temperatures gave rise to three iron(II) coordination polymers, namely, one-dimensional [Fe(L')(NCS)2](1), two-dimensional [Fe(L)2(NCS)2] H2O (2), and one-dimensional [Fe(L)2(NCS)2] 2CH2Cl 2 4MeOH (3). The formation of 1 involved an in situ C=C coupling reaction, L to L' [L' = 5,6-di(pyridin-4-yl)-1,2,3,4-tetrahydropyrazine], which was catalyzed by cyanide ions decomposed from thiocyanates; the manganese(II)(1a) and zinc(II)(1b) analogues of 1 were also synthesized for comparison. Magnetic studies showed that complex 1 underwent a pressure-dependent one-step incomplete spin transition whereas complexes 2 and 3 were paramagnetic in the whole temperature range.

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U2 - 10.1021/ic101490a

DO - 10.1021/ic101490a

M3 - Article

AN - SCOPUS:79951603060

SN - 0020-1669

VL - 50

SP - 911

EP - 917

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 3

ER -

Temperature-dependent in situ ligand cyclization via C=C coupling and formation of a spin-crossover iron(II) coordination polymer

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