I use a varian inova 500 NMR machine. it has vnmrj 2.1B software. An auto-x pfg 500 Mhz probe and auto tuning unit also. I need to do a 1H-31P hetcore experiment but I failed every time. I try to change default pulse sequenceS for 1H-13C HSQC or HMBC to 1H-31P nucleus but result is negative. what must I do for a successful 1H-31P Hsqc or Hmbc experiment?

I use a varian inova 500 NMR machine. it has vnmrj 2.1B software. An auto-x pfg 500 Mhz probe and auto tuning unit also. I need to do a 1H-31P hetcore experiment but I failed every time. I try to change default pulse sequenceS for 1H-13C HSQC or HMBC to 1H-31P nucleus but result is negative. what must I do for a successful 1H-31P Hsqc or Hmbc experiment?

I use a varian inova 500 NMR machine. it has vnmrj 2.1B software. An auto-x pfg 500 Mhz probe and auto tuning unit also. I need to do a 1H-31P hetcore experiment but I failed every time. I try to change default pulse sequenceS for 1H-13C HSQC or HMBC to 1H-31P nucleus but result is negative. what must I do for a successful 1H-31P Hsqc or Hmbc experiment?

I use a varian inova 500 NMR machine. it has vnmrj 2.1B software. An auto-x pfg 500 Mhz probe and auto tuning unit also. I need to do a 1H-31P hetcore experiment but I failed every time. I try to change default pulse sequenceS for 1H-13C HSQC or HMBC to 1H-31P nucleus but result is negative. what must I do for a successful 1H-31P Hsqc or Hmbc experiment?