In this paper, we present and analyze a family of fifth-order iterative methods free from second derivative for solving nonlinear equations. It is established that the family of iterative methods has convergence order...In this paper, we present and analyze a family of fifth-order iterative methods free from second derivative for solving nonlinear equations. It is established that the family of iterative methods has convergence order five. Numerical examples show that the new methods are comparable with the well known existing methods and give better results in many aspects.展开更多
The title compound 1,5-diphenyl-3-phenacylthio-1H-1,2,4-triazole 2 （C22H17- N3OS, Mr = 371.45） was prepared by the reaction of 1-benzoyl-3-phenyl-aminothiourea 1 with 2-bromoacetophenone. The crystal is of triclinic...The title compound 1,5-diphenyl-3-phenacylthio-1H-1,2,4-triazole 2 （C22H17- N3OS, Mr = 371.45） was prepared by the reaction of 1-benzoyl-3-phenyl-aminothiourea 1 with 2-bromoacetophenone. The crystal is of triclinic, space group P^1-, a = 8.906（3）, b = 9.853（3）, c = 11.226（4）A, α= 100.562（5）, β= 101.285（5）, γ. = 105.096（6）^c, Z = 2, V = 903.7（5） ]A^3, Dc= 1.365 g/cm^3,μ（MoKa） = 0.196 mm^-1, F（000） = 388, the final R = 0.0506 and wR = 0.0985 for 2532 observed reflections （I〉 2σ（I））. Its formation mechanism was proposed.展开更多
文摘In this paper, we present and analyze a family of fifth-order iterative methods free from second derivative for solving nonlinear equations. It is established that the family of iterative methods has convergence order five. Numerical examples show that the new methods are comparable with the well known existing methods and give better results in many aspects.
基金The project was supported by the Key Laboratory of Organic Synthesis of Jiangsu Province (JSK016)
文摘The title compound 1,5-diphenyl-3-phenacylthio-1H-1,2,4-triazole 2 （C22H17- N3OS, Mr = 371.45） was prepared by the reaction of 1-benzoyl-3-phenyl-aminothiourea 1 with 2-bromoacetophenone. The crystal is of triclinic, space group P^1-, a = 8.906（3）, b = 9.853（3）, c = 11.226（4）A, α= 100.562（5）, β= 101.285（5）, γ. = 105.096（6）^c, Z = 2, V = 903.7（5） ]A^3, Dc= 1.365 g/cm^3,μ（MoKa） = 0.196 mm^-1, F（000） = 388, the final R = 0.0506 and wR = 0.0985 for 2532 observed reflections （I〉 2σ（I））. Its formation mechanism was proposed.
