|A image of a man married to four women, i.e. a pentahumanide molecule, a type of polyhumanide molecule, compared to carbon bonded to our hydrogen atoms, as shown on the "immoral" vs "moral" articles.|
Dihumanide | 2
A dihumanide molecule is bound state of two human molecules, e.g. a marriage. 
In 1809, German polyintellect Goethe, using Bergman symbols, defined a married couple or friendship as an AB union held in a bonding bracket type bond.
In 1987, Indian-born Pakistani organometallic chemist Mirza Beg, in his New Dimensions in Sociology: a Physico-Chemical Approach to Human Behavior, referred to bonded associations of individual people: A, B, C, etc., which he refers to as chemical species or molecules, as he alludes, of form AB, BC, AC, AA, etc., as “dimers”, such as the formation of "close friends denoted by AB formed according to reaction":
In 1995, Libb Thims, thinking about child reproduction, had the following reaction in mind, where A is a man, B is a women, which are the reactants, and C is a child-turning-adult product:
A + B → C
In c.2000, American child prodigy turned astrophysicist Christopher Hirata, in his “The Physics of Relationships”, was used the symbols of X = girl, Y = boy, and XY = paired relationship, calling the single boys and girls, i.e. men and women on his college campus, as “basic elements”, defining the pair bonding reaction as follows: 
X + Y ↔ XY
Hirata also comments, in reference to the subject of queer chemistry (and other poly-amorphous relationships), in his human chemical reaction modeling, that he is neglecting “rare and non-traditional” products or compounds (human molecules), such as the "gay molecule" which he symbolizes as Y2:
X + X ↔ X2
or the "lesbian molecule" which he symbolizes as X2:
Y+ Y ↔ Y2
Trihumanide | 3
A trihumanide molecule is a is bound state of three human molecules, e.g. a nuclear family.
In 1987, Mirza Beg defined the union of three people, as AAB or ABC, etc., as as “trimmer” or human trimmer, referring to things such as the "ABC society", wherein he employs the following equilibriating reaction: 
which, according to Beg, will have the following equilibrium constant:
Tetrahumanide | 4
A tetrahumanide molecule is a is bound state of four human molecules.
In 1987, Mirza Beg defined the union of four religiously-distinct societies of people, e.g. Hindus, Muslims, Buddhists, and Christians, as a “polymer” or human trimmer, referring to things such as the "ABCD society or system", wherein he employs the following equilibriating reaction: 
|In 1910, Henry Bray discussed how the formation of iron sulfate FeSO4 as akin to a sultan with a harem of four women; which is akin to Christopher Hirata's circa 2000 labeling of such model as a "middle-Eastern polygamous molecule", which he symbolically defined as X4Y.|
A pentahumanide molecule is bound state of five human molecules.
In 1910, American polymath Henry Bray gave the following statement: 
“If now this sulphide of iron be allowed to remain in a damp atmosphere, an efflorescence will be seen to collect on its surface composed of a saline matter. The sulphide of iron has here attracted to its family-life certain other individuals. Like a sultan, or Abraham, Isaac, and Jacob of old; so the iron, not being content with one young damsel, takes to itself four others, fair as the moon in its fullness, in the persons of four atoms of oxygen from the air, forming what is known as green vitriol or sulphate of iron.”In c.2000, Christopher Hirata, in his “The Physics of Relationships”, stated the following:
“In our model, we are neglecting rare and non-traditional products may form such as the middle-Eastern polygamous molecule X4Y.”
Hexahumanide | 6
A hexahumanide molecule is bound state of six human molecules.
Heptahumanide | 7
Octahumanide | 8
Enneahumanide | 9
Decahumanide | 10
1. (a) Thims, Libb. (2007). Human Chemistry (Volume One) (dihumanide molecule, pgs. 34, 119, 170, 282). Morrisville, NC: LuLu.
(b) Thims, Libb. (2007). Human Chemistry (Volume Two) (pg. 68). Morrisville, NC: LuLu.
2. Bray, Henry T. (1910). The Living Universe (pgs. 185-86). Truro Publishing Co., 1920.
3. (a) Hirata, Christopher M. (c.2000). “The Physics of Relationships” (section: Fun), Tapir.Caltech.edu; (WayBack Machine).
(b) Hirata, Christopher M. (2010). "The Physics of Relationships", Journal of Human Thermodynamics, 6(5): 62-76.
4. Beg, Mirza Arshad Ali. (1987). New Dimensions in Sociology: a Physico-Chemical Approach to Human Behavior (abs) (intro) (pdf, annotations by Libb Thims, 2014) (ABC society, pg. 75; ABCD system or society, pg. 149). Karachi: The Hamdard Foundation.