Use of Tetradentate (N2O2) Ligands To Form Monomeric, Trimetallic Gallium Complexes

David A. Atwood, Drew Rutherford

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Members of the SalanH4 class of tetradentate (N2O2) ligand, N,N'-bis(o-hydroxybenzyl)1,2-diaminoethane (SaleanH4), N,N'-bis(o-hydroxybenzyl)-1,3-diaminopropane (SalpanH4), N,N'-bis(o-hydroxybenzyl)-1,2-diaminobenzene (SalophanH4), and N,N'-bis(o-hydroxybenzyl)1,2-diamino-4,5-dimethylbenzene (SalomphanH4), react with 3 equiv of GaMe3 to form the trimetallic complexes SaleanGaMe(GaMe2)2 (1), SalpanGaMe(GaMe2)2 (2), SalophanGaMe(GaMe2)2 (3), and SalomphanGaMe(GaMe2)2 (4). Similar reactions of the SalanH4 ligands with GaEt3 form SaleanGaEt(GaEt2)2 (5), SalpanGaEt(GaEt2)2 (6), SalophanGaEt(GaEt2)2 (7), and SalomphanGaEt(GaEt2)2 (8). For these compounds, the 1H NMR data indicate the presence of rigid solution state geometries. A crystallographic study of 1, 2, and 5 demonstrates that the molecules contain a central GaR group (R = Me, Et) which is coordinated in a planar array to the nitrogens and oxygens of the ligand. The remaining GaR2 groups each bridge an oxygen and nitrogen atom. Compound 1 contains one molecule of toluene as solvent of crystallization. Crystal data are as follows. 1: C28H39Ga3N2O2, space group P21/c (no. 14), with a = 10.694(2) Å, b = 14.101(2) Å, c = 19.184(2) Å, β = 94.040(10)°, V = 2885.5(7) Å3, and Z = 4. With 316 parameters refined on 2615 reflections having F > 4.0σ(F), the final R values were R = 0.0498 and Rw = 0.0545. 2: C22H33Ga3N2O2, space Group P21/c (no. 14), with a = 16.247(12) Å, b = 9.588(9) Å, c = 17.131(8) Å, β = 116.21(4)°, V = 2395(3) Å3and Z = 4. With 262 parameters refined on 1777 reflections having F > 6.0σ(F), the final R values were R = 0.0690 and Rw = 0.0763. 5: C26H41Ga3N2O2, space group monoclinic P21/n (no. 14), with a = 8.433(1) Å, b = 22.010(2) Å, c = 15.241(1) Å, β = 98.81(1)°, V = 2795.4(5) Å3, and Z = 4. With 298 parameters refined on 2111 reflections having F > 4.0σ(F), the final R values were R = 0.0458 and Rw = 0.0492.

Original languageEnglish
Pages (from-to)2880-2886
Number of pages7
JournalOrganometallics
Volume14
Issue number6
DOIs
StatePublished - Jun 1995

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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