题目

求翻译 化学类文献
Design and synthesis: 6-Phenyl-2,2’-bipyridine (HC^N^N)
and 1,3-di(pyridin-2-yl)benzene (HN^C^N) represent the
basic designs of common p-conjugated tridentate cyclometalating
ligands for cyclometalated PtII systems. However,
these well-established ligand systems are difficult to be further
modified or functionalised. The presence of a 1-pyrazolyl-
NH on the new cyclometalating ligand, HL1, enables its
easy functionalisation by nucleophilic substitution.[14] We
demonstrated this by direct alkylation of the 1-pyrazolyl-
NH site on HL1 with 1,5-dibromopentane to generate HL2
in good yield. Further nucleophilic substitution of the terminal
alkyl bromide on HL2 by PPh3 yielded the triphenylphosphonium-
functionalised cyclometalating ligand, triphenyl{
5-[3-(6-phenylpyridin-2-yl)-1H-pyrazol-1-yl]pentyl}phosphonium
bromide (HL3) (Scheme 1). The chloride salt of
HL3 was obtained by simple metathesis. The corresponding提问时间：2020-11-02

答案

设计和合成：6苯基-2,2’-二吡啶（HC∧N∧N）和1,3-二（吡啶-2-yl）苯（HN∧C∧N）代表用于环金属铂II系统的普通π共轭三齿环金属配体.可是,这些成熟的配体系统难于进一步改性或官能化.1-吡唑基-NH在新的环金属配体H...