The answer is that <span style="font-size:12.0pt;font-family:"Times New Roman","serif";
mso-fareast-font-family:"Times New Roman";mso-ansi-language:UK;mso-fareast-language:
UK;mso-bidi-language:AR-SA">Beryllium is Group 2 element and it can form
something like BeH2. So the compound Be2H6 is not possible.
This is not the answer for this question. The question was "Does Be2H6 exist?"