Synthesis and structure of new lanthanoid carbonate "lanthaballs"

Anthony S R Chesman, David Roger Turner, Stuart K Langley, Boujemaa Moubaraki, Keith Spencer Murray, Glen Berenger Deacon, Stuart Robert Batten

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Abstract

New insights into the synthesis of high-nuclearity polycarbonatolanthanoid complexes have been obtained from a detailed investigation of the preparative methods that initially yielded the so-called lanthaballs [Ln(13)(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)]center dot Cl-3(CO3)center dot 25H(2)O [alpha-1Ln; Ln = La, Ce, Pr; phen = 1,10-phenanthroline; ccnm = carbamoylcyanonitrosomethanide]. From this investigation, we have isolated a new pseudopolymorph of the cerium analogue of the lanthaball, [Ce-13(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)]center dot Cl-3 center dot CO3 (beta-1Ce). This new pseudopolymorph arose from a preparation in which fixation of atmospheric carbon dioxide generated the carbonate, and the ccnm ligand was formed in situ by the nucleophilic addition of water to dicyanonitrosomethanide. From a reaction of cerium(III) nitrate, instead of the previously used chloride salt, with (Et4N)(ccnm), phen, and NaHCO3 in aqueous methanol, the new complex Na[Ce-13(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)](NO3)(6)center dot 20H(2)O (2Ce) crystallized. A variant of this reaction in which sodium carbonate was initially added to Ce(NO3)(3), followed by phen and (Et4N)(ccnm), also gave 2Ce. However, an analogous preparation with (Me4N)(ccnm) gave a mixture of crystals of 2Ce and the coordination polymer [CeNa(ccnm)(4)(phen)(3)]center dot MeOH (3), which were manually separated. The use of cerium(III) acetate in place of cerium nitrate in the initial preparation did not give a high-nuclearity complex but a new coordination polymer, [Ce(ccnm)(OAc)(2)(phen)] (4). The first lanthaball to incorporate neodymium, namely, [Nd-13(ccnm)(4)(CO3)(14)(NO3)(4)(H2O)(7)(phen)(15)](NO3)(3)center dot 10H(2)O (5Nd), was isolated from a preparation similar to that of the second method used for 2Ce, and its magnetic properties showed an antiferromagnetic interaction. The identity of all products was established by X-ray crystallography.
Original languageEnglish
Pages (from-to)792 - 800
Number of pages9
JournalInorganic Chemistry
Volume54
Issue number3
DOIs
Publication statusPublished - 2015

Cite this

@article{aa6a7c9987d64d1d94ddcf34ce715bde,
title = "Synthesis and structure of new lanthanoid carbonate {"}lanthaballs{"}",
abstract = "New insights into the synthesis of high-nuclearity polycarbonatolanthanoid complexes have been obtained from a detailed investigation of the preparative methods that initially yielded the so-called lanthaballs [Ln(13)(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)]center dot Cl-3(CO3)center dot 25H(2)O [alpha-1Ln; Ln = La, Ce, Pr; phen = 1,10-phenanthroline; ccnm = carbamoylcyanonitrosomethanide]. From this investigation, we have isolated a new pseudopolymorph of the cerium analogue of the lanthaball, [Ce-13(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)]center dot Cl-3 center dot CO3 (beta-1Ce). This new pseudopolymorph arose from a preparation in which fixation of atmospheric carbon dioxide generated the carbonate, and the ccnm ligand was formed in situ by the nucleophilic addition of water to dicyanonitrosomethanide. From a reaction of cerium(III) nitrate, instead of the previously used chloride salt, with (Et4N)(ccnm), phen, and NaHCO3 in aqueous methanol, the new complex Na[Ce-13(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)](NO3)(6)center dot 20H(2)O (2Ce) crystallized. A variant of this reaction in which sodium carbonate was initially added to Ce(NO3)(3), followed by phen and (Et4N)(ccnm), also gave 2Ce. However, an analogous preparation with (Me4N)(ccnm) gave a mixture of crystals of 2Ce and the coordination polymer [CeNa(ccnm)(4)(phen)(3)]center dot MeOH (3), which were manually separated. The use of cerium(III) acetate in place of cerium nitrate in the initial preparation did not give a high-nuclearity complex but a new coordination polymer, [Ce(ccnm)(OAc)(2)(phen)] (4). The first lanthaball to incorporate neodymium, namely, [Nd-13(ccnm)(4)(CO3)(14)(NO3)(4)(H2O)(7)(phen)(15)](NO3)(3)center dot 10H(2)O (5Nd), was isolated from a preparation similar to that of the second method used for 2Ce, and its magnetic properties showed an antiferromagnetic interaction. The identity of all products was established by X-ray crystallography.",
author = "Chesman, {Anthony S R} and Turner, {David Roger} and Langley, {Stuart K} and Boujemaa Moubaraki and Murray, {Keith Spencer} and Deacon, {Glen Berenger} and Batten, {Stuart Robert}",
year = "2015",
doi = "10.1021/ic5016115",
language = "English",
volume = "54",
pages = "792 -- 800",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "3",

}

Synthesis and structure of new lanthanoid carbonate "lanthaballs". / Chesman, Anthony S R; Turner, David Roger; Langley, Stuart K; Moubaraki, Boujemaa; Murray, Keith Spencer; Deacon, Glen Berenger; Batten, Stuart Robert.

In: Inorganic Chemistry, Vol. 54, No. 3, 2015, p. 792 - 800.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Synthesis and structure of new lanthanoid carbonate "lanthaballs"

AU - Chesman, Anthony S R

AU - Turner, David Roger

AU - Langley, Stuart K

AU - Moubaraki, Boujemaa

AU - Murray, Keith Spencer

AU - Deacon, Glen Berenger

AU - Batten, Stuart Robert

PY - 2015

Y1 - 2015

N2 - New insights into the synthesis of high-nuclearity polycarbonatolanthanoid complexes have been obtained from a detailed investigation of the preparative methods that initially yielded the so-called lanthaballs [Ln(13)(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)]center dot Cl-3(CO3)center dot 25H(2)O [alpha-1Ln; Ln = La, Ce, Pr; phen = 1,10-phenanthroline; ccnm = carbamoylcyanonitrosomethanide]. From this investigation, we have isolated a new pseudopolymorph of the cerium analogue of the lanthaball, [Ce-13(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)]center dot Cl-3 center dot CO3 (beta-1Ce). This new pseudopolymorph arose from a preparation in which fixation of atmospheric carbon dioxide generated the carbonate, and the ccnm ligand was formed in situ by the nucleophilic addition of water to dicyanonitrosomethanide. From a reaction of cerium(III) nitrate, instead of the previously used chloride salt, with (Et4N)(ccnm), phen, and NaHCO3 in aqueous methanol, the new complex Na[Ce-13(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)](NO3)(6)center dot 20H(2)O (2Ce) crystallized. A variant of this reaction in which sodium carbonate was initially added to Ce(NO3)(3), followed by phen and (Et4N)(ccnm), also gave 2Ce. However, an analogous preparation with (Me4N)(ccnm) gave a mixture of crystals of 2Ce and the coordination polymer [CeNa(ccnm)(4)(phen)(3)]center dot MeOH (3), which were manually separated. The use of cerium(III) acetate in place of cerium nitrate in the initial preparation did not give a high-nuclearity complex but a new coordination polymer, [Ce(ccnm)(OAc)(2)(phen)] (4). The first lanthaball to incorporate neodymium, namely, [Nd-13(ccnm)(4)(CO3)(14)(NO3)(4)(H2O)(7)(phen)(15)](NO3)(3)center dot 10H(2)O (5Nd), was isolated from a preparation similar to that of the second method used for 2Ce, and its magnetic properties showed an antiferromagnetic interaction. The identity of all products was established by X-ray crystallography.

AB - New insights into the synthesis of high-nuclearity polycarbonatolanthanoid complexes have been obtained from a detailed investigation of the preparative methods that initially yielded the so-called lanthaballs [Ln(13)(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)]center dot Cl-3(CO3)center dot 25H(2)O [alpha-1Ln; Ln = La, Ce, Pr; phen = 1,10-phenanthroline; ccnm = carbamoylcyanonitrosomethanide]. From this investigation, we have isolated a new pseudopolymorph of the cerium analogue of the lanthaball, [Ce-13(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)]center dot Cl-3 center dot CO3 (beta-1Ce). This new pseudopolymorph arose from a preparation in which fixation of atmospheric carbon dioxide generated the carbonate, and the ccnm ligand was formed in situ by the nucleophilic addition of water to dicyanonitrosomethanide. From a reaction of cerium(III) nitrate, instead of the previously used chloride salt, with (Et4N)(ccnm), phen, and NaHCO3 in aqueous methanol, the new complex Na[Ce-13(ccnm)(6)(CO3)(14)(H2O)(6)(phen)(18)](NO3)(6)center dot 20H(2)O (2Ce) crystallized. A variant of this reaction in which sodium carbonate was initially added to Ce(NO3)(3), followed by phen and (Et4N)(ccnm), also gave 2Ce. However, an analogous preparation with (Me4N)(ccnm) gave a mixture of crystals of 2Ce and the coordination polymer [CeNa(ccnm)(4)(phen)(3)]center dot MeOH (3), which were manually separated. The use of cerium(III) acetate in place of cerium nitrate in the initial preparation did not give a high-nuclearity complex but a new coordination polymer, [Ce(ccnm)(OAc)(2)(phen)] (4). The first lanthaball to incorporate neodymium, namely, [Nd-13(ccnm)(4)(CO3)(14)(NO3)(4)(H2O)(7)(phen)(15)](NO3)(3)center dot 10H(2)O (5Nd), was isolated from a preparation similar to that of the second method used for 2Ce, and its magnetic properties showed an antiferromagnetic interaction. The identity of all products was established by X-ray crystallography.

UR - http://pubs.acs.org/doi/pdf/10.1021/ic5016115

U2 - 10.1021/ic5016115

DO - 10.1021/ic5016115

M3 - Article

VL - 54

SP - 792

EP - 800

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 3

ER -